/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 13:29:36,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 13:29:36,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 13:29:36,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 13:29:36,704 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 13:29:36,731 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 13:29:36,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 13:29:36,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 13:29:36,732 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 13:29:36,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 13:29:36,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 13:29:36,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 13:29:36,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 13:29:36,733 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 13:29:36,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 13:29:36,734 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 13:29:36,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 13:29:36,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 13:29:36,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 13:29:36,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 13:29:36,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 13:29:36,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 13:29:36,735 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 13:29:36,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 13:29:36,735 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 13:29:36,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 13:29:36,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 13:29:36,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 13:29:36,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 13:29:36,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 13:29:36,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:29:36,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 13:29:36,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 13:29:36,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 13:29:36,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 13:29:36,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 13:29:36,737 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 13:29:36,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 13:29:36,737 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 13:29:36,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 13:29:36,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 13:29:36,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 13:29:36,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 13:29:36,958 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 13:29:36,959 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 13:29:36,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2022-02-16 13:29:36,960 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2022-02-16 13:29:36,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 13:29:36,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 13:29:36,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 13:29:36,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 13:29:36,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 13:29:36,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,006 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 13:29:37,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 13:29:37,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 13:29:37,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 13:29:37,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 13:29:37,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 13:29:37,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 13:29:37,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 13:29:37,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 13:29:37,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/1) ... [2022-02-16 13:29:37,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:29:37,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:29:37,053 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) [2022-02-16 13:29:37,059 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 [2022-02-16 13:29:37,091 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 13:29:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 13:29:37,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 13:29:37,091 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 13:29:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 13:29:37,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 13:29:37,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 13:29:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 13:29:37,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 13:29:37,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-16 13:29:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-16 13:29:37,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-16 13:29:37,093 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 13:29:37,135 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 13:29:37,137 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 13:29:37,264 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 13:29:37,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 13:29:37,276 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 13:29:37,277 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:29:37 BoogieIcfgContainer [2022-02-16 13:29:37,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 13:29:37,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 13:29:37,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 13:29:37,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 13:29:37,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:29:36" (1/2) ... [2022-02-16 13:29:37,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f25edc and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:29:37, skipping insertion in model container [2022-02-16 13:29:37,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:29:37" (2/2) ... [2022-02-16 13:29:37,284 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2022-02-16 13:29:37,289 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 13:29:37,289 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 13:29:37,289 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 13:29:37,290 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 13:29:37,343 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-16 13:29:37,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:29:37,397 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 [2022-02-16 13:29:37,398 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-16 13:29:37,422 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-02-16 13:29:37,469 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:29:52,934 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 1176402 transitions and produced 458096 states. [2022-02-16 13:29:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 458096 states, 308145 states have (on average 2.0925440945009655) internal successors, (644807), 458095 states have internal predecessors, (644807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:29:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:29:55,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:29:55,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:29:55,656 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:29:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:29:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash 262077514, now seen corresponding path program 1 times [2022-02-16 13:29:55,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:29:55,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512370646] [2022-02-16 13:29:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:29:55,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:29:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:29:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:29:58,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:29:58,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512370646] [2022-02-16 13:29:58,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512370646] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:29:58,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:29:58,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-16 13:29:58,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110431109] [2022-02-16 13:29:58,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:29:58,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 13:29:58,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:29:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 13:29:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 13:30:02,261 INFO L87 Difference]: Start difference. First operand has 458096 states, 308145 states have (on average 2.0925440945009655) internal successors, (644807), 458095 states have internal predecessors, (644807), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:13,358 INFO L93 Difference]: Finished difference Result 458088 states and 644799 transitions. [2022-02-16 13:30:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 13:30:13,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:30:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:14,399 INFO L225 Difference]: With dead ends: 458088 [2022-02-16 13:30:14,399 INFO L226 Difference]: Without dead ends: 172739 [2022-02-16 13:30:14,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 13:30:14,403 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:14,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172739 states. [2022-02-16 13:30:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172739 to 128. [2022-02-16 13:30:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.251968503937008) internal successors, (286), 127 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2022-02-16 13:30:16,944 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 15 [2022-02-16 13:30:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:16,945 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2022-02-16 13:30:16,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2022-02-16 13:30:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:16,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:16,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:16,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 13:30:16,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:16,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1466075176, now seen corresponding path program 1 times [2022-02-16 13:30:16,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:16,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225436354] [2022-02-16 13:30:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:16,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:17,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:17,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225436354] [2022-02-16 13:30:17,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225436354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:17,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626181214] [2022-02-16 13:30:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:17,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:17,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:17,097 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) [2022-02-16 13:30:17,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 13:30:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 13:30:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:17,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:17,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626181214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:17,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:17,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-02-16 13:30:17,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920917908] [2022-02-16 13:30:17,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:17,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:30:17,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:30:17,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:30:17,384 INFO L87 Difference]: Start difference. First operand 128 states and 286 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:17,556 INFO L93 Difference]: Finished difference Result 224 states and 434 transitions. [2022-02-16 13:30:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:30:17,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:17,558 INFO L225 Difference]: With dead ends: 224 [2022-02-16 13:30:17,558 INFO L226 Difference]: Without dead ends: 224 [2022-02-16 13:30:17,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:30:17,560 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:17,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 56 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-16 13:30:17,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2022-02-16 13:30:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.25) internal successors, (306), 136 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 306 transitions. [2022-02-16 13:30:17,580 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 306 transitions. Word has length 17 [2022-02-16 13:30:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:17,583 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 306 transitions. [2022-02-16 13:30:17,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 306 transitions. [2022-02-16 13:30:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:17,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:17,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:17,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:17,799 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 [2022-02-16 13:30:17,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash -383672408, now seen corresponding path program 1 times [2022-02-16 13:30:17,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:17,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983290019] [2022-02-16 13:30:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:17,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:17,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:17,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983290019] [2022-02-16 13:30:17,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983290019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:17,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423721252] [2022-02-16 13:30:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:17,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:17,872 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) [2022-02-16 13:30:17,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 13:30:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:18,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:18,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423721252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:18,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:18,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-02-16 13:30:18,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101125327] [2022-02-16 13:30:18,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:18,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:30:18,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:18,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:30:18,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:18,149 INFO L87 Difference]: Start difference. First operand 137 states and 306 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:18,642 INFO L93 Difference]: Finished difference Result 295 states and 592 transitions. [2022-02-16 13:30:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:30:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:18,644 INFO L225 Difference]: With dead ends: 295 [2022-02-16 13:30:18,644 INFO L226 Difference]: Without dead ends: 294 [2022-02-16 13:30:18,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:30:18,645 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 127 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:18,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 80 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-16 13:30:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 148. [2022-02-16 13:30:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.2653061224489797) internal successors, (333), 147 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 333 transitions. [2022-02-16 13:30:18,650 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 333 transitions. Word has length 17 [2022-02-16 13:30:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:18,650 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 333 transitions. [2022-02-16 13:30:18,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 333 transitions. [2022-02-16 13:30:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:18,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:18,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:18,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:18,862 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,SelfDestructingSolverStorable2 [2022-02-16 13:30:18,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash -448209364, now seen corresponding path program 1 times [2022-02-16 13:30:18,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:18,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039135304] [2022-02-16 13:30:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:18,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:18,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:18,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039135304] [2022-02-16 13:30:18,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039135304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:30:18,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:30:18,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 13:30:18,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178435227] [2022-02-16 13:30:18,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:30:18,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:30:18,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:30:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:30:18,907 INFO L87 Difference]: Start difference. First operand 148 states and 333 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:18,962 INFO L93 Difference]: Finished difference Result 197 states and 414 transitions. [2022-02-16 13:30:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:30:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:18,972 INFO L225 Difference]: With dead ends: 197 [2022-02-16 13:30:18,972 INFO L226 Difference]: Without dead ends: 196 [2022-02-16 13:30:18,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:30:18,975 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:18,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:30:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-16 13:30:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 149. [2022-02-16 13:30:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.25) internal successors, (333), 148 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 333 transitions. [2022-02-16 13:30:18,981 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 333 transitions. Word has length 17 [2022-02-16 13:30:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:18,981 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 333 transitions. [2022-02-16 13:30:18,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 333 transitions. [2022-02-16 13:30:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:18,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:18,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:18,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-16 13:30:18,982 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:18,983 INFO L85 PathProgramCache]: Analyzing trace with hash 274904492, now seen corresponding path program 2 times [2022-02-16 13:30:18,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:18,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803494547] [2022-02-16 13:30:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:18,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:19,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:19,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803494547] [2022-02-16 13:30:19,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803494547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:19,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43919093] [2022-02-16 13:30:19,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:30:19,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:19,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:19,055 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) [2022-02-16 13:30:19,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 13:30:19,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:19,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:19,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:19,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:19,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43919093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:19,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:19,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-02-16 13:30:19,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137627963] [2022-02-16 13:30:19,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:19,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:30:19,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:30:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:19,318 INFO L87 Difference]: Start difference. First operand 149 states and 333 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:19,572 INFO L93 Difference]: Finished difference Result 296 states and 598 transitions. [2022-02-16 13:30:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:30:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:19,577 INFO L225 Difference]: With dead ends: 296 [2022-02-16 13:30:19,577 INFO L226 Difference]: Without dead ends: 296 [2022-02-16 13:30:19,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:30:19,578 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 115 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:19,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 57 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-16 13:30:19,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 148. [2022-02-16 13:30:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.251700680272109) internal successors, (331), 147 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 331 transitions. [2022-02-16 13:30:19,585 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 331 transitions. Word has length 17 [2022-02-16 13:30:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:19,585 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 331 transitions. [2022-02-16 13:30:19,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 331 transitions. [2022-02-16 13:30:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:19,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:19,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:19,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:19,807 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 [2022-02-16 13:30:19,808 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1013816724, now seen corresponding path program 3 times [2022-02-16 13:30:19,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:19,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971874556] [2022-02-16 13:30:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:19,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:19,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:19,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971874556] [2022-02-16 13:30:19,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971874556] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:19,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768946680] [2022-02-16 13:30:19,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:30:19,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:19,880 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) [2022-02-16 13:30:19,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 13:30:19,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:30:19,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:19,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:20,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:20,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768946680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:20,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:20,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-02-16 13:30:20,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573360535] [2022-02-16 13:30:20,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:20,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:30:20,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:30:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:20,112 INFO L87 Difference]: Start difference. First operand 148 states and 331 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:20,365 INFO L93 Difference]: Finished difference Result 290 states and 613 transitions. [2022-02-16 13:30:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:30:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:20,367 INFO L225 Difference]: With dead ends: 290 [2022-02-16 13:30:20,367 INFO L226 Difference]: Without dead ends: 290 [2022-02-16 13:30:20,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:30:20,368 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:20,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-16 13:30:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 152. [2022-02-16 13:30:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.23841059602649) internal successors, (338), 151 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 338 transitions. [2022-02-16 13:30:20,373 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 338 transitions. Word has length 17 [2022-02-16 13:30:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:20,373 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 338 transitions. [2022-02-16 13:30:20,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 338 transitions. [2022-02-16 13:30:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:20,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:20,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:20,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:20,574 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 [2022-02-16 13:30:20,575 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1994127248, now seen corresponding path program 2 times [2022-02-16 13:30:20,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:20,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023498094] [2022-02-16 13:30:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:20,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:20,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:20,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023498094] [2022-02-16 13:30:20,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023498094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:30:20,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:30:20,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 13:30:20,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101069942] [2022-02-16 13:30:20,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:30:20,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:30:20,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:30:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:30:20,612 INFO L87 Difference]: Start difference. First operand 152 states and 338 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:20,658 INFO L93 Difference]: Finished difference Result 210 states and 427 transitions. [2022-02-16 13:30:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:30:20,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:20,659 INFO L225 Difference]: With dead ends: 210 [2022-02-16 13:30:20,659 INFO L226 Difference]: Without dead ends: 206 [2022-02-16 13:30:20,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:30:20,660 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:20,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 14 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:30:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-16 13:30:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-02-16 13:30:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2022-02-16 13:30:20,664 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 17 [2022-02-16 13:30:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:20,665 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2022-02-16 13:30:20,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2022-02-16 13:30:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:20,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:20,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:20,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-16 13:30:20,666 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2123356328, now seen corresponding path program 2 times [2022-02-16 13:30:20,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:20,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109122130] [2022-02-16 13:30:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:20,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:20,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:20,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109122130] [2022-02-16 13:30:20,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109122130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:30:20,710 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:30:20,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:30:20,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677200318] [2022-02-16 13:30:20,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:30:20,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:30:20,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:30:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:30:20,712 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:20,765 INFO L93 Difference]: Finished difference Result 195 states and 408 transitions. [2022-02-16 13:30:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:30:20,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:20,766 INFO L225 Difference]: With dead ends: 195 [2022-02-16 13:30:20,766 INFO L226 Difference]: Without dead ends: 195 [2022-02-16 13:30:20,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:30:20,767 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:20,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:30:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-16 13:30:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 144. [2022-02-16 13:30:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.174825174825175) internal successors, (311), 143 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 311 transitions. [2022-02-16 13:30:20,771 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 311 transitions. Word has length 17 [2022-02-16 13:30:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:20,771 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 311 transitions. [2022-02-16 13:30:20,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 311 transitions. [2022-02-16 13:30:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:20,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:20,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:20,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-16 13:30:20,773 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:20,773 INFO L85 PathProgramCache]: Analyzing trace with hash -992998172, now seen corresponding path program 4 times [2022-02-16 13:30:20,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:20,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447621554] [2022-02-16 13:30:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:20,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:20,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:20,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447621554] [2022-02-16 13:30:20,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447621554] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:30:20,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:30:20,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:30:20,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425482773] [2022-02-16 13:30:20,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:30:20,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:30:20,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:20,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:30:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:30:20,817 INFO L87 Difference]: Start difference. First operand 144 states and 311 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:20,878 INFO L93 Difference]: Finished difference Result 175 states and 365 transitions. [2022-02-16 13:30:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:30:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:20,879 INFO L225 Difference]: With dead ends: 175 [2022-02-16 13:30:20,879 INFO L226 Difference]: Without dead ends: 173 [2022-02-16 13:30:20,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:30:20,880 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:20,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:30:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-16 13:30:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 150. [2022-02-16 13:30:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2022-02-16 13:30:20,884 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 17 [2022-02-16 13:30:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:20,884 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2022-02-16 13:30:20,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2022-02-16 13:30:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:20,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:20,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:20,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-16 13:30:20,885 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:20,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:20,886 INFO L85 PathProgramCache]: Analyzing trace with hash 111596520, now seen corresponding path program 5 times [2022-02-16 13:30:20,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:20,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015213021] [2022-02-16 13:30:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:20,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:20,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:20,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015213021] [2022-02-16 13:30:20,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015213021] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:30:20,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:30:20,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:30:20,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065956720] [2022-02-16 13:30:20,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:30:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:30:20,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:20,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:30:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:30:20,925 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:20,997 INFO L93 Difference]: Finished difference Result 174 states and 369 transitions. [2022-02-16 13:30:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:30:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:20,998 INFO L225 Difference]: With dead ends: 174 [2022-02-16 13:30:20,998 INFO L226 Difference]: Without dead ends: 174 [2022-02-16 13:30:20,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:30:20,999 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:20,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:30:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-16 13:30:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 147. [2022-02-16 13:30:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.164383561643836) internal successors, (316), 146 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) [2022-02-16 13:30:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 316 transitions. [2022-02-16 13:30:21,003 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 316 transitions. Word has length 17 [2022-02-16 13:30:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:21,003 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 316 transitions. [2022-02-16 13:30:21,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 316 transitions. [2022-02-16 13:30:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:30:21,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:21,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:21,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-16 13:30:21,004 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2090037080, now seen corresponding path program 6 times [2022-02-16 13:30:21,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:21,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956656993] [2022-02-16 13:30:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:21,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:21,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:21,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956656993] [2022-02-16 13:30:21,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956656993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:21,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892157741] [2022-02-16 13:30:21,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:30:21,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:21,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:21,050 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) [2022-02-16 13:30:21,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 13:30:21,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:30:21,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:21,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:21,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:21,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892157741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:21,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:21,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-02-16 13:30:21,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232715357] [2022-02-16 13:30:21,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:21,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:30:21,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:21,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:30:21,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:21,277 INFO L87 Difference]: Start difference. First operand 147 states and 316 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:21,780 INFO L93 Difference]: Finished difference Result 250 states and 524 transitions. [2022-02-16 13:30:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:30:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:30:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:21,781 INFO L225 Difference]: With dead ends: 250 [2022-02-16 13:30:21,781 INFO L226 Difference]: Without dead ends: 250 [2022-02-16 13:30:21,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:30:21,782 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 67 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:21,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 68 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-16 13:30:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 146. [2022-02-16 13:30:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1655172413793102) internal successors, (314), 145 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 314 transitions. [2022-02-16 13:30:21,785 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 314 transitions. Word has length 17 [2022-02-16 13:30:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:21,786 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 314 transitions. [2022-02-16 13:30:21,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 314 transitions. [2022-02-16 13:30:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:30:21,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:21,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:21,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:21,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-16 13:30:21,987 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1311878150, now seen corresponding path program 1 times [2022-02-16 13:30:21,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:21,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578720167] [2022-02-16 13:30:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:21,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:22,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:22,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578720167] [2022-02-16 13:30:22,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578720167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:22,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678386937] [2022-02-16 13:30:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:22,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:22,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:22,056 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) [2022-02-16 13:30:22,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 13:30:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:22,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:30:22,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:22,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:22,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678386937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:22,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:22,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-02-16 13:30:22,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593254243] [2022-02-16 13:30:22,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:22,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:30:22,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:22,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:30:22,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:30:22,351 INFO L87 Difference]: Start difference. First operand 146 states and 314 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:22,398 INFO L93 Difference]: Finished difference Result 427 states and 870 transitions. [2022-02-16 13:30:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:30:22,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:30:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:22,400 INFO L225 Difference]: With dead ends: 427 [2022-02-16 13:30:22,400 INFO L226 Difference]: Without dead ends: 413 [2022-02-16 13:30:22,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:30:22,401 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:22,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 86 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:30:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-02-16 13:30:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 281. [2022-02-16 13:30:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.307142857142857) internal successors, (646), 280 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 646 transitions. [2022-02-16 13:30:22,407 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 646 transitions. Word has length 19 [2022-02-16 13:30:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:22,407 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 646 transitions. [2022-02-16 13:30:22,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 646 transitions. [2022-02-16 13:30:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:30:22,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:22,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:22,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:22,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:22,620 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash 390090442, now seen corresponding path program 2 times [2022-02-16 13:30:22,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:22,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460836699] [2022-02-16 13:30:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:22,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:22,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:22,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460836699] [2022-02-16 13:30:22,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460836699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:22,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253523881] [2022-02-16 13:30:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:30:22,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:22,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:22,705 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) [2022-02-16 13:30:22,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 13:30:22,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:22,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:30:22,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:22,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:30:22,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253523881] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:22,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-16 13:30:22,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2022-02-16 13:30:22,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223219308] [2022-02-16 13:30:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:30:22,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:30:22,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:30:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:30:22,973 INFO L87 Difference]: Start difference. First operand 281 states and 646 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:23,004 INFO L93 Difference]: Finished difference Result 450 states and 983 transitions. [2022-02-16 13:30:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:30:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:30:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:23,005 INFO L225 Difference]: With dead ends: 450 [2022-02-16 13:30:23,006 INFO L226 Difference]: Without dead ends: 443 [2022-02-16 13:30:23,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:30:23,006 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:23,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:30:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-16 13:30:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 395. [2022-02-16 13:30:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.33248730964467) internal successors, (919), 394 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 919 transitions. [2022-02-16 13:30:23,013 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 919 transitions. Word has length 19 [2022-02-16 13:30:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:23,014 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 919 transitions. [2022-02-16 13:30:23,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 919 transitions. [2022-02-16 13:30:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:23,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:23,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:23,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:23,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:23,239 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1351608092, now seen corresponding path program 3 times [2022-02-16 13:30:23,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:23,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070010666] [2022-02-16 13:30:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:23,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:23,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:23,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070010666] [2022-02-16 13:30:23,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070010666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:23,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331376231] [2022-02-16 13:30:23,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:30:23,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:23,284 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) [2022-02-16 13:30:23,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 13:30:23,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:30:23,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:23,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:23,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331376231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:23,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:23,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-02-16 13:30:23,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043121502] [2022-02-16 13:30:23,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:23,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:30:23,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:30:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:23,487 INFO L87 Difference]: Start difference. First operand 395 states and 919 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:23,711 INFO L93 Difference]: Finished difference Result 990 states and 2113 transitions. [2022-02-16 13:30:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:30:23,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:23,714 INFO L225 Difference]: With dead ends: 990 [2022-02-16 13:30:23,714 INFO L226 Difference]: Without dead ends: 990 [2022-02-16 13:30:23,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:30:23,715 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 192 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:23,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 74 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-16 13:30:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 615. [2022-02-16 13:30:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.462540716612378) internal successors, (1512), 614 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1512 transitions. [2022-02-16 13:30:23,729 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1512 transitions. Word has length 21 [2022-02-16 13:30:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:23,729 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1512 transitions. [2022-02-16 13:30:23,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1512 transitions. [2022-02-16 13:30:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:23,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:23,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:23,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-16 13:30:23,956 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash -842575772, now seen corresponding path program 4 times [2022-02-16 13:30:23,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:23,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413418665] [2022-02-16 13:30:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:23,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:24,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:24,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413418665] [2022-02-16 13:30:24,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413418665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:24,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823093254] [2022-02-16 13:30:24,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:30:24,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:24,014 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) [2022-02-16 13:30:24,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 13:30:24,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:30:24,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:24,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:24,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:24,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:24,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823093254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:24,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:24,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-16 13:30:24,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865785573] [2022-02-16 13:30:24,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:24,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:24,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:24,268 INFO L87 Difference]: Start difference. First operand 615 states and 1512 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-16 13:30:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:25,349 INFO L93 Difference]: Finished difference Result 1358 states and 2876 transitions. [2022-02-16 13:30:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 13:30:25,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 21 [2022-02-16 13:30:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:25,352 INFO L225 Difference]: With dead ends: 1358 [2022-02-16 13:30:25,352 INFO L226 Difference]: Without dead ends: 1358 [2022-02-16 13:30:25,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=950, Invalid=2832, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 13:30:25,354 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 306 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:25,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 165 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:30:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-02-16 13:30:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 665. [2022-02-16 13:30:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.4849397590361444) internal successors, (1650), 664 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1650 transitions. [2022-02-16 13:30:25,371 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1650 transitions. Word has length 21 [2022-02-16 13:30:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:25,371 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1650 transitions. [2022-02-16 13:30:25,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-16 13:30:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1650 transitions. [2022-02-16 13:30:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:25,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:25,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:25,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-16 13:30:25,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-16 13:30:25,602 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:25,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:25,602 INFO L85 PathProgramCache]: Analyzing trace with hash -907112728, now seen corresponding path program 1 times [2022-02-16 13:30:25,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:25,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907658858] [2022-02-16 13:30:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:25,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:25,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:25,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907658858] [2022-02-16 13:30:25,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907658858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:25,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037683776] [2022-02-16 13:30:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:25,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:25,666 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) [2022-02-16 13:30:25,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 13:30:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 13:30:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:25,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:25,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037683776] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:25,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:25,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-16 13:30:25,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490322332] [2022-02-16 13:30:25,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:25,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:30:25,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:30:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:30:25,899 INFO L87 Difference]: Start difference. First operand 665 states and 1650 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:26,587 INFO L93 Difference]: Finished difference Result 1867 states and 4010 transitions. [2022-02-16 13:30:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:30:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:26,596 INFO L225 Difference]: With dead ends: 1867 [2022-02-16 13:30:26,596 INFO L226 Difference]: Without dead ends: 1859 [2022-02-16 13:30:26,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 13:30:26,598 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 236 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:26,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 142 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:30:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2022-02-16 13:30:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 968. [2022-02-16 13:30:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 2.5687693898655635) internal successors, (2484), 967 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 2484 transitions. [2022-02-16 13:30:26,715 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 2484 transitions. Word has length 21 [2022-02-16 13:30:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:26,715 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 2484 transitions. [2022-02-16 13:30:26,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 2484 transitions. [2022-02-16 13:30:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:26,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:26,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:26,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:26,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-16 13:30:26,918 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash 139769656, now seen corresponding path program 2 times [2022-02-16 13:30:26,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:26,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830451801] [2022-02-16 13:30:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:26,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:26,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:26,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830451801] [2022-02-16 13:30:26,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830451801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:26,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589041106] [2022-02-16 13:30:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:30:26,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:26,996 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) [2022-02-16 13:30:27,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 13:30:27,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:27,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:27,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 13:30:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:27,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:27,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589041106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:27,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:27,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-16 13:30:27,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057670222] [2022-02-16 13:30:27,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:27,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:30:27,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:30:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:30:27,220 INFO L87 Difference]: Start difference. First operand 968 states and 2484 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:27,596 INFO L93 Difference]: Finished difference Result 1518 states and 3575 transitions. [2022-02-16 13:30:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:30:27,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:27,602 INFO L225 Difference]: With dead ends: 1518 [2022-02-16 13:30:27,602 INFO L226 Difference]: Without dead ends: 1518 [2022-02-16 13:30:27,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:30:27,603 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:27,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 77 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-02-16 13:30:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1026. [2022-02-16 13:30:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 2.5551219512195122) internal successors, (2619), 1025 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 2619 transitions. [2022-02-16 13:30:27,627 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 2619 transitions. Word has length 21 [2022-02-16 13:30:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:27,627 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 2619 transitions. [2022-02-16 13:30:27,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 2619 transitions. [2022-02-16 13:30:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:27,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:27,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:27,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:27,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-16 13:30:27,847 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:27,848 INFO L85 PathProgramCache]: Analyzing trace with hash -266564956, now seen corresponding path program 5 times [2022-02-16 13:30:27,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:27,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064919600] [2022-02-16 13:30:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:27,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:27,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:27,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064919600] [2022-02-16 13:30:27,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064919600] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:27,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828785204] [2022-02-16 13:30:27,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:30:27,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:27,903 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) [2022-02-16 13:30:27,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 13:30:27,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:30:27,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:28,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:28,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828785204] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:28,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:28,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-16 13:30:28,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133577620] [2022-02-16 13:30:28,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:28,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:28,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:28,181 INFO L87 Difference]: Start difference. First operand 1026 states and 2619 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:28,808 INFO L93 Difference]: Finished difference Result 1543 states and 3446 transitions. [2022-02-16 13:30:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:30:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:28,812 INFO L225 Difference]: With dead ends: 1543 [2022-02-16 13:30:28,812 INFO L226 Difference]: Without dead ends: 1535 [2022-02-16 13:30:28,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:30:28,814 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 295 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:28,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 136 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-02-16 13:30:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1043. [2022-02-16 13:30:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.542226487523992) internal successors, (2649), 1042 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2649 transitions. [2022-02-16 13:30:28,835 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2649 transitions. Word has length 21 [2022-02-16 13:30:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:28,836 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 2649 transitions. [2022-02-16 13:30:28,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2649 transitions. [2022-02-16 13:30:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:28,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:28,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:28,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:29,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-16 13:30:29,051 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash -980025752, now seen corresponding path program 6 times [2022-02-16 13:30:29,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:29,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273574803] [2022-02-16 13:30:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:29,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:29,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:29,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273574803] [2022-02-16 13:30:29,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273574803] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:29,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808558974] [2022-02-16 13:30:29,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:30:29,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:29,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:29,100 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) [2022-02-16 13:30:29,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 13:30:29,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:30:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:29,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:29,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808558974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:29,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:29,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-16 13:30:29,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121098940] [2022-02-16 13:30:29,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:29,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:29,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:29,353 INFO L87 Difference]: Start difference. First operand 1043 states and 2649 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:30,350 INFO L93 Difference]: Finished difference Result 2134 states and 4812 transitions. [2022-02-16 13:30:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 13:30:30,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:30,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:30,356 INFO L225 Difference]: With dead ends: 2134 [2022-02-16 13:30:30,356 INFO L226 Difference]: Without dead ends: 2134 [2022-02-16 13:30:30,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 13:30:30,357 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 330 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:30,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 123 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:30:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2022-02-16 13:30:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1186. [2022-02-16 13:30:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 2.611814345991561) internal successors, (3095), 1185 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3095 transitions. [2022-02-16 13:30:30,383 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3095 transitions. Word has length 21 [2022-02-16 13:30:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:30,384 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 3095 transitions. [2022-02-16 13:30:30,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3095 transitions. [2022-02-16 13:30:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:30,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:30,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:30,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-16 13:30:30,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:30,595 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2026220328, now seen corresponding path program 7 times [2022-02-16 13:30:30,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:30,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046530726] [2022-02-16 13:30:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:30,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:30,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:30,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046530726] [2022-02-16 13:30:30,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046530726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:30,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540575] [2022-02-16 13:30:30,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:30:30,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:30,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:30,640 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) [2022-02-16 13:30:30,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 13:30:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:30,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:30,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:30,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:30,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:30,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-16 13:30:30,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511312352] [2022-02-16 13:30:30,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:30,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:30,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:30,904 INFO L87 Difference]: Start difference. First operand 1186 states and 3095 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:31,721 INFO L93 Difference]: Finished difference Result 1984 states and 4543 transitions. [2022-02-16 13:30:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 13:30:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:31,725 INFO L225 Difference]: With dead ends: 1984 [2022-02-16 13:30:31,726 INFO L226 Difference]: Without dead ends: 1984 [2022-02-16 13:30:31,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=647, Invalid=1609, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:30:31,727 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 356 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:31,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 111 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-02-16 13:30:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1205. [2022-02-16 13:30:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 2.5980066445182723) internal successors, (3128), 1204 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 3128 transitions. [2022-02-16 13:30:31,756 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 3128 transitions. Word has length 21 [2022-02-16 13:30:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:31,757 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 3128 transitions. [2022-02-16 13:30:31,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 3128 transitions. [2022-02-16 13:30:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:31,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:31,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:31,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-16 13:30:31,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:31,975 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1045909804, now seen corresponding path program 8 times [2022-02-16 13:30:31,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:31,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612631810] [2022-02-16 13:30:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:31,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:32,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:32,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612631810] [2022-02-16 13:30:32,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612631810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:32,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640985353] [2022-02-16 13:30:32,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:30:32,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:32,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:32,023 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) [2022-02-16 13:30:32,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 13:30:32,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:32,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:32,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:32,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:32,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640985353] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:32,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:32,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-16 13:30:32,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106779278] [2022-02-16 13:30:32,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:32,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:30:32,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:32,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:30:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:30:32,153 INFO L87 Difference]: Start difference. First operand 1205 states and 3128 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:32,317 INFO L93 Difference]: Finished difference Result 1592 states and 3767 transitions. [2022-02-16 13:30:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:30:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:32,321 INFO L225 Difference]: With dead ends: 1592 [2022-02-16 13:30:32,321 INFO L226 Difference]: Without dead ends: 1587 [2022-02-16 13:30:32,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:30:32,322 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:32,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 58 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-02-16 13:30:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1211. [2022-02-16 13:30:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 2.5809917355371903) internal successors, (3123), 1210 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 3123 transitions. [2022-02-16 13:30:32,345 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 3123 transitions. Word has length 21 [2022-02-16 13:30:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:32,346 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 3123 transitions. [2022-02-16 13:30:32,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 3123 transitions. [2022-02-16 13:30:32,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:32,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:32,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:32,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:32,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:32,564 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:32,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2084982696, now seen corresponding path program 9 times [2022-02-16 13:30:32,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:32,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495812232] [2022-02-16 13:30:32,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:32,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:32,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:32,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495812232] [2022-02-16 13:30:32,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495812232] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:32,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859473754] [2022-02-16 13:30:32,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:30:32,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:32,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:32,610 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) [2022-02-16 13:30:32,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 13:30:32,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:30:32,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:32,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:32,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:32,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859473754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:32,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:32,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-16 13:30:32,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767709211] [2022-02-16 13:30:32,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:32,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:32,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:32,844 INFO L87 Difference]: Start difference. First operand 1211 states and 3123 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:33,408 INFO L93 Difference]: Finished difference Result 1684 states and 3858 transitions. [2022-02-16 13:30:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 13:30:33,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:33,412 INFO L225 Difference]: With dead ends: 1684 [2022-02-16 13:30:33,412 INFO L226 Difference]: Without dead ends: 1674 [2022-02-16 13:30:33,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 13:30:33,413 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 332 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:33,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 116 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-02-16 13:30:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1244. [2022-02-16 13:30:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.564762670957361) internal successors, (3188), 1243 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 3188 transitions. [2022-02-16 13:30:33,437 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 3188 transitions. Word has length 21 [2022-02-16 13:30:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:33,437 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 3188 transitions. [2022-02-16 13:30:33,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 3188 transitions. [2022-02-16 13:30:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:33,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:33,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:33,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:33,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-16 13:30:33,661 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash -571500376, now seen corresponding path program 10 times [2022-02-16 13:30:33,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:33,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251755177] [2022-02-16 13:30:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:33,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:33,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:33,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251755177] [2022-02-16 13:30:33,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251755177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:33,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68886034] [2022-02-16 13:30:33,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:30:33,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:33,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:33,706 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) [2022-02-16 13:30:33,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 13:30:33,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:30:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:33,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:33,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68886034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:33,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:33,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-16 13:30:33,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709152185] [2022-02-16 13:30:33,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:33,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:33,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:33,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:33,910 INFO L87 Difference]: Start difference. First operand 1244 states and 3188 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:34,785 INFO L93 Difference]: Finished difference Result 1707 states and 3886 transitions. [2022-02-16 13:30:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 13:30:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:34,789 INFO L225 Difference]: With dead ends: 1707 [2022-02-16 13:30:34,789 INFO L226 Difference]: Without dead ends: 1707 [2022-02-16 13:30:34,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 13:30:34,790 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 258 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:34,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 159 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:30:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2022-02-16 13:30:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1253. [2022-02-16 13:30:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.556709265175719) internal successors, (3201), 1252 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3201 transitions. [2022-02-16 13:30:34,812 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3201 transitions. Word has length 21 [2022-02-16 13:30:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:34,812 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 3201 transitions. [2022-02-16 13:30:34,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3201 transitions. [2022-02-16 13:30:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:34,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:34,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:34,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:35,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:35,028 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -67552600, now seen corresponding path program 11 times [2022-02-16 13:30:35,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:35,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042689942] [2022-02-16 13:30:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:35,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:35,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:35,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042689942] [2022-02-16 13:30:35,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042689942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:35,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363573983] [2022-02-16 13:30:35,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:30:35,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:35,064 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) [2022-02-16 13:30:35,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 13:30:35,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:30:35,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:35,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:35,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:35,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363573983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:35,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:35,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-16 13:30:35,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109996967] [2022-02-16 13:30:35,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:35,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:30:35,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:30:35,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:30:35,282 INFO L87 Difference]: Start difference. First operand 1253 states and 3201 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:35,414 INFO L93 Difference]: Finished difference Result 2290 states and 5460 transitions. [2022-02-16 13:30:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:30:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:35,419 INFO L225 Difference]: With dead ends: 2290 [2022-02-16 13:30:35,420 INFO L226 Difference]: Without dead ends: 2290 [2022-02-16 13:30:35,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:30:35,420 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:35,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 63 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-02-16 13:30:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1603. [2022-02-16 13:30:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 2.634207240948814) internal successors, (4220), 1602 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4220 transitions. [2022-02-16 13:30:35,451 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4220 transitions. Word has length 21 [2022-02-16 13:30:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:35,451 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 4220 transitions. [2022-02-16 13:30:35,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4220 transitions. [2022-02-16 13:30:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:35,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:35,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:35,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:35,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:35,679 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:35,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1917300184, now seen corresponding path program 12 times [2022-02-16 13:30:35,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:35,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298935415] [2022-02-16 13:30:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:35,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:35,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:35,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298935415] [2022-02-16 13:30:35,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298935415] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:35,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2223273] [2022-02-16 13:30:35,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:30:35,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:35,732 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) [2022-02-16 13:30:35,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 13:30:35,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:30:35,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:35,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:35,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:35,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:35,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2223273] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:35,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:35,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-16 13:30:35,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700414603] [2022-02-16 13:30:35,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:35,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:35,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:35,951 INFO L87 Difference]: Start difference. First operand 1603 states and 4220 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:36,700 INFO L93 Difference]: Finished difference Result 2277 states and 5501 transitions. [2022-02-16 13:30:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 13:30:36,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:36,705 INFO L225 Difference]: With dead ends: 2277 [2022-02-16 13:30:36,706 INFO L226 Difference]: Without dead ends: 2277 [2022-02-16 13:30:36,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 13:30:36,707 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 219 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:36,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 135 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-02-16 13:30:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1634. [2022-02-16 13:30:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.6411512553582366) internal successors, (4313), 1633 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4313 transitions. [2022-02-16 13:30:36,739 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4313 transitions. Word has length 21 [2022-02-16 13:30:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:36,742 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 4313 transitions. [2022-02-16 13:30:36,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4313 transitions. [2022-02-16 13:30:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:36,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:36,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:36,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:36,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:36,959 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash 767212272, now seen corresponding path program 13 times [2022-02-16 13:30:36,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:36,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703559378] [2022-02-16 13:30:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:36,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:36,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:36,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703559378] [2022-02-16 13:30:36,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703559378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:36,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902858309] [2022-02-16 13:30:36,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:30:36,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:36,992 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) [2022-02-16 13:30:36,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 13:30:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:37,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:37,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:37,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:37,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902858309] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:37,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:37,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-16 13:30:37,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064943176] [2022-02-16 13:30:37,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:37,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:30:37,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:37,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:30:37,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:30:37,124 INFO L87 Difference]: Start difference. First operand 1634 states and 4313 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:37,232 INFO L93 Difference]: Finished difference Result 2127 states and 5124 transitions. [2022-02-16 13:30:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:30:37,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:37,237 INFO L225 Difference]: With dead ends: 2127 [2022-02-16 13:30:37,237 INFO L226 Difference]: Without dead ends: 2122 [2022-02-16 13:30:37,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:30:37,238 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 156 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:37,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 39 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-02-16 13:30:37,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1634. [2022-02-16 13:30:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.6319657072872014) internal successors, (4298), 1633 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4298 transitions. [2022-02-16 13:30:37,271 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4298 transitions. Word has length 21 [2022-02-16 13:30:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:37,271 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 4298 transitions. [2022-02-16 13:30:37,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4298 transitions. [2022-02-16 13:30:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:37,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:37,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:37,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:37,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-16 13:30:37,490 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash 348573924, now seen corresponding path program 14 times [2022-02-16 13:30:37,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:37,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329829745] [2022-02-16 13:30:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:37,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:37,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:37,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329829745] [2022-02-16 13:30:37,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329829745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:37,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482471713] [2022-02-16 13:30:37,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:30:37,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:37,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:37,535 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) [2022-02-16 13:30:37,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 13:30:37,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:37,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:37,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:37,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:37,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482471713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:37,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:37,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 13 [2022-02-16 13:30:37,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930031220] [2022-02-16 13:30:37,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:37,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:30:37,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:37,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:30:37,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:30:37,774 INFO L87 Difference]: Start difference. First operand 1634 states and 4298 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:38,210 INFO L93 Difference]: Finished difference Result 1754 states and 4473 transitions. [2022-02-16 13:30:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:30:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:38,213 INFO L225 Difference]: With dead ends: 1754 [2022-02-16 13:30:38,213 INFO L226 Difference]: Without dead ends: 1750 [2022-02-16 13:30:38,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:30:38,214 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:38,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 125 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-02-16 13:30:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1657. [2022-02-16 13:30:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 2.623792270531401) internal successors, (4345), 1656 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 4345 transitions. [2022-02-16 13:30:38,236 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 4345 transitions. Word has length 21 [2022-02-16 13:30:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:38,236 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 4345 transitions. [2022-02-16 13:30:38,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 4345 transitions. [2022-02-16 13:30:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:38,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:38,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:38,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-16 13:30:38,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-16 13:30:38,439 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1353324952, now seen corresponding path program 1 times [2022-02-16 13:30:38,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:38,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960272424] [2022-02-16 13:30:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:38,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:38,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:38,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960272424] [2022-02-16 13:30:38,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960272424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:38,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126544642] [2022-02-16 13:30:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:38,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:38,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:38,485 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) [2022-02-16 13:30:38,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 13:30:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:38,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:38,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:38,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126544642] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:38,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:38,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-02-16 13:30:38,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026183749] [2022-02-16 13:30:38,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:38,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:30:38,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:30:38,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:30:38,852 INFO L87 Difference]: Start difference. First operand 1657 states and 4345 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:39,341 INFO L93 Difference]: Finished difference Result 1911 states and 4736 transitions. [2022-02-16 13:30:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 13:30:39,341 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:39,344 INFO L225 Difference]: With dead ends: 1911 [2022-02-16 13:30:39,344 INFO L226 Difference]: Without dead ends: 1911 [2022-02-16 13:30:39,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:30:39,345 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 158 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:39,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 151 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-02-16 13:30:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1701. [2022-02-16 13:30:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.608235294117647) internal successors, (4434), 1700 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4434 transitions. [2022-02-16 13:30:39,366 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4434 transitions. Word has length 21 [2022-02-16 13:30:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:39,366 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 4434 transitions. [2022-02-16 13:30:39,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4434 transitions. [2022-02-16 13:30:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:39,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:39,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:39,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-16 13:30:39,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-16 13:30:39,570 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1051169772, now seen corresponding path program 2 times [2022-02-16 13:30:39,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:39,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472082048] [2022-02-16 13:30:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:39,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:39,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:39,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472082048] [2022-02-16 13:30:39,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472082048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:39,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562801165] [2022-02-16 13:30:39,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:30:39,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:39,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:39,611 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) [2022-02-16 13:30:39,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 13:30:39,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:39,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:39,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562801165] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:39,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:39,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-16 13:30:39,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597098354] [2022-02-16 13:30:39,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:39,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:30:39,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:30:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:30:39,742 INFO L87 Difference]: Start difference. First operand 1701 states and 4434 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:39,896 INFO L93 Difference]: Finished difference Result 2566 states and 6251 transitions. [2022-02-16 13:30:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:30:39,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:39,901 INFO L225 Difference]: With dead ends: 2566 [2022-02-16 13:30:39,901 INFO L226 Difference]: Without dead ends: 2562 [2022-02-16 13:30:39,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:30:39,908 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:39,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 40 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2022-02-16 13:30:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1976. [2022-02-16 13:30:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 2.647594936708861) internal successors, (5229), 1975 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 5229 transitions. [2022-02-16 13:30:39,948 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 5229 transitions. Word has length 21 [2022-02-16 13:30:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:39,948 INFO L470 AbstractCegarLoop]: Abstraction has 1976 states and 5229 transitions. [2022-02-16 13:30:39,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 5229 transitions. [2022-02-16 13:30:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:39,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:39,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:39,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:40,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:40,175 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 915180216, now seen corresponding path program 3 times [2022-02-16 13:30:40,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:40,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667444798] [2022-02-16 13:30:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:40,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:40,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:40,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667444798] [2022-02-16 13:30:40,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667444798] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:40,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62041548] [2022-02-16 13:30:40,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:30:40,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:40,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:40,204 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) [2022-02-16 13:30:40,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 13:30:40,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:30:40,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:40,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:40,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62041548] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:40,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:40,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-16 13:30:40,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500066727] [2022-02-16 13:30:40,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:40,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:30:40,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:30:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:30:40,354 INFO L87 Difference]: Start difference. First operand 1976 states and 5229 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:40,496 INFO L93 Difference]: Finished difference Result 2813 states and 6841 transitions. [2022-02-16 13:30:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:30:40,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:40,501 INFO L225 Difference]: With dead ends: 2813 [2022-02-16 13:30:40,501 INFO L226 Difference]: Without dead ends: 2813 [2022-02-16 13:30:40,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:30:40,502 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 112 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:40,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 54 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-02-16 13:30:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 1986. [2022-02-16 13:30:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 2.6387909319899245) internal successors, (5238), 1985 states have internal predecessors, (5238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 5238 transitions. [2022-02-16 13:30:40,533 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 5238 transitions. Word has length 21 [2022-02-16 13:30:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:40,533 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 5238 transitions. [2022-02-16 13:30:40,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 5238 transitions. [2022-02-16 13:30:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:40,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:40,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:40,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:40,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:40,738 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash 264648436, now seen corresponding path program 4 times [2022-02-16 13:30:40,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:40,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663212076] [2022-02-16 13:30:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:40,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:40,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:40,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663212076] [2022-02-16 13:30:40,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663212076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:40,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498415442] [2022-02-16 13:30:40,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:30:40,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:40,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:40,776 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) [2022-02-16 13:30:40,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 13:30:40,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:30:40,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:40,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:40,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498415442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:40,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:40,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-16 13:30:40,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004795569] [2022-02-16 13:30:40,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:40,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:40,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:40,984 INFO L87 Difference]: Start difference. First operand 1986 states and 5238 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:41,319 INFO L93 Difference]: Finished difference Result 2122 states and 5437 transitions. [2022-02-16 13:30:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:30:41,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:41,323 INFO L225 Difference]: With dead ends: 2122 [2022-02-16 13:30:41,323 INFO L226 Difference]: Without dead ends: 2118 [2022-02-16 13:30:41,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:30:41,324 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 119 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:41,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 117 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2022-02-16 13:30:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1988. [2022-02-16 13:30:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.6366381479617513) internal successors, (5239), 1987 states have internal predecessors, (5239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5239 transitions. [2022-02-16 13:30:41,348 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5239 transitions. Word has length 21 [2022-02-16 13:30:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:41,348 INFO L470 AbstractCegarLoop]: Abstraction has 1988 states and 5239 transitions. [2022-02-16 13:30:41,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5239 transitions. [2022-02-16 13:30:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:41,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:41,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:41,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-16 13:30:41,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-02-16 13:30:41,552 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2080372868, now seen corresponding path program 5 times [2022-02-16 13:30:41,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:41,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022162135] [2022-02-16 13:30:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:41,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:41,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:41,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022162135] [2022-02-16 13:30:41,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022162135] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:41,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643900982] [2022-02-16 13:30:41,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:30:41,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:41,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:41,592 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) [2022-02-16 13:30:41,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 13:30:41,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:30:41,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:41,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:41,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:41,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643900982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:41,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:41,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-02-16 13:30:41,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959128426] [2022-02-16 13:30:41,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:41,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:30:41,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:30:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:41,737 INFO L87 Difference]: Start difference. First operand 1988 states and 5239 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:41,907 INFO L93 Difference]: Finished difference Result 3114 states and 7695 transitions. [2022-02-16 13:30:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:30:41,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:41,912 INFO L225 Difference]: With dead ends: 3114 [2022-02-16 13:30:41,913 INFO L226 Difference]: Without dead ends: 3112 [2022-02-16 13:30:41,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:30:41,913 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:41,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 76 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2022-02-16 13:30:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2381. [2022-02-16 13:30:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.641596638655462) internal successors, (6287), 2380 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6287 transitions. [2022-02-16 13:30:42,010 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6287 transitions. Word has length 21 [2022-02-16 13:30:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:42,010 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 6287 transitions. [2022-02-16 13:30:42,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6287 transitions. [2022-02-16 13:30:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:42,015 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:42,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:42,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-02-16 13:30:42,235 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1808259816, now seen corresponding path program 6 times [2022-02-16 13:30:42,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:42,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455111239] [2022-02-16 13:30:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:42,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:42,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:42,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455111239] [2022-02-16 13:30:42,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455111239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:42,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004789672] [2022-02-16 13:30:42,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:30:42,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:42,274 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) [2022-02-16 13:30:42,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 13:30:42,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:30:42,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:42,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:42,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:42,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:42,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004789672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:42,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:42,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-02-16 13:30:42,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175135806] [2022-02-16 13:30:42,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:42,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:30:42,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:42,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:30:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:30:42,502 INFO L87 Difference]: Start difference. First operand 2381 states and 6287 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:42,826 INFO L93 Difference]: Finished difference Result 2564 states and 6564 transitions. [2022-02-16 13:30:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:30:42,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:42,831 INFO L225 Difference]: With dead ends: 2564 [2022-02-16 13:30:42,831 INFO L226 Difference]: Without dead ends: 2556 [2022-02-16 13:30:42,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:30:42,831 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 135 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:42,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 95 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-02-16 13:30:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2401. [2022-02-16 13:30:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 2400 states have (on average 2.6358333333333333) internal successors, (6326), 2400 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 6326 transitions. [2022-02-16 13:30:42,860 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 6326 transitions. Word has length 21 [2022-02-16 13:30:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:42,860 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 6326 transitions. [2022-02-16 13:30:42,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 6326 transitions. [2022-02-16 13:30:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:42,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:42,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:42,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-16 13:30:43,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:43,065 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:43,065 INFO L85 PathProgramCache]: Analyzing trace with hash -298769556, now seen corresponding path program 7 times [2022-02-16 13:30:43,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:43,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091617446] [2022-02-16 13:30:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:43,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:43,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:43,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091617446] [2022-02-16 13:30:43,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091617446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:43,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411517745] [2022-02-16 13:30:43,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:30:43,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:43,112 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) [2022-02-16 13:30:43,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 13:30:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:43,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:43,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:43,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411517745] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:43,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:43,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-02-16 13:30:43,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993157458] [2022-02-16 13:30:43,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:43,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:30:43,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:43,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:30:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:30:43,310 INFO L87 Difference]: Start difference. First operand 2401 states and 6326 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:43,815 INFO L93 Difference]: Finished difference Result 2967 states and 7439 transitions. [2022-02-16 13:30:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:30:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:43,821 INFO L225 Difference]: With dead ends: 2967 [2022-02-16 13:30:43,821 INFO L226 Difference]: Without dead ends: 2967 [2022-02-16 13:30:43,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=1199, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:30:43,823 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 161 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:43,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 106 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2022-02-16 13:30:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2418. [2022-02-16 13:30:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.6309474555233763) internal successors, (6359), 2417 states have internal predecessors, (6359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6359 transitions. [2022-02-16 13:30:43,870 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6359 transitions. Word has length 21 [2022-02-16 13:30:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:43,870 INFO L470 AbstractCegarLoop]: Abstraction has 2418 states and 6359 transitions. [2022-02-16 13:30:43,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6359 transitions. [2022-02-16 13:30:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:43,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:43,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:43,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:44,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:44,102 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash -573402644, now seen corresponding path program 3 times [2022-02-16 13:30:44,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:44,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186597159] [2022-02-16 13:30:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:44,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:44,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:44,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186597159] [2022-02-16 13:30:44,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186597159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:44,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355232599] [2022-02-16 13:30:44,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:30:44,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:44,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:44,140 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) [2022-02-16 13:30:44,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 13:30:44,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:30:44,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:44,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 13:30:44,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:44,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:44,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355232599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:44,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:44,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-02-16 13:30:44,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743508877] [2022-02-16 13:30:44,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:44,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:30:44,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:44,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:30:44,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:30:44,317 INFO L87 Difference]: Start difference. First operand 2418 states and 6359 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:45,060 INFO L93 Difference]: Finished difference Result 3461 states and 8352 transitions. [2022-02-16 13:30:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 13:30:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:45,066 INFO L225 Difference]: With dead ends: 3461 [2022-02-16 13:30:45,066 INFO L226 Difference]: Without dead ends: 3453 [2022-02-16 13:30:45,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=633, Invalid=1817, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 13:30:45,067 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 253 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:45,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 121 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:30:45,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2022-02-16 13:30:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 2526. [2022-02-16 13:30:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 2.6455445544554457) internal successors, (6680), 2525 states have internal predecessors, (6680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 6680 transitions. [2022-02-16 13:30:45,212 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 6680 transitions. Word has length 21 [2022-02-16 13:30:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:45,212 INFO L470 AbstractCegarLoop]: Abstraction has 2526 states and 6680 transitions. [2022-02-16 13:30:45,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 6680 transitions. [2022-02-16 13:30:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:45,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:45,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:45,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:45,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:45,441 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1358531152, now seen corresponding path program 15 times [2022-02-16 13:30:45,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:45,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285344073] [2022-02-16 13:30:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:45,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:45,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:45,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285344073] [2022-02-16 13:30:45,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285344073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:45,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430686427] [2022-02-16 13:30:45,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:30:45,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:45,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:45,471 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) [2022-02-16 13:30:45,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 13:30:45,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:30:45,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:45,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:30:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:45,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:45,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430686427] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:45,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:45,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-16 13:30:45,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295268479] [2022-02-16 13:30:45,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:30:45,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:30:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:30:45,596 INFO L87 Difference]: Start difference. First operand 2526 states and 6680 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) 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) [2022-02-16 13:30:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:45,742 INFO L93 Difference]: Finished difference Result 3290 states and 8022 transitions. [2022-02-16 13:30:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:30:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) 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 21 [2022-02-16 13:30:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:45,747 INFO L225 Difference]: With dead ends: 3290 [2022-02-16 13:30:45,747 INFO L226 Difference]: Without dead ends: 3285 [2022-02-16 13:30:45,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:30:45,748 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 172 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:45,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 52 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2022-02-16 13:30:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 2540. [2022-02-16 13:30:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 2.636471051595116) internal successors, (6694), 2539 states have internal predecessors, (6694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 6694 transitions. [2022-02-16 13:30:45,784 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 6694 transitions. Word has length 21 [2022-02-16 13:30:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:45,784 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 6694 transitions. [2022-02-16 13:30:45,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) 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) [2022-02-16 13:30:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 6694 transitions. [2022-02-16 13:30:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:45,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:45,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:45,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-16 13:30:45,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-16 13:30:45,988 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:45,989 INFO L85 PathProgramCache]: Analyzing trace with hash 808073784, now seen corresponding path program 4 times [2022-02-16 13:30:45,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:45,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121120734] [2022-02-16 13:30:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:45,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:46,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:46,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121120734] [2022-02-16 13:30:46,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121120734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:46,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061760608] [2022-02-16 13:30:46,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:30:46,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:46,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:46,045 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) [2022-02-16 13:30:46,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 13:30:46,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:30:46,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 13:30:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:46,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:46,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061760608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:46,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:46,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-02-16 13:30:46,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065084203] [2022-02-16 13:30:46,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:46,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:30:46,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:30:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:30:46,255 INFO L87 Difference]: Start difference. First operand 2540 states and 6694 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:46,543 INFO L93 Difference]: Finished difference Result 3173 states and 8023 transitions. [2022-02-16 13:30:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:30:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:46,548 INFO L225 Difference]: With dead ends: 3173 [2022-02-16 13:30:46,548 INFO L226 Difference]: Without dead ends: 3173 [2022-02-16 13:30:46,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:30:46,549 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 122 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:46,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 97 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2022-02-16 13:30:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 2522. [2022-02-16 13:30:46,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 2.631892106307021) internal successors, (6635), 2521 states have internal predecessors, (6635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 6635 transitions. [2022-02-16 13:30:46,598 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 6635 transitions. Word has length 21 [2022-02-16 13:30:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:46,598 INFO L470 AbstractCegarLoop]: Abstraction has 2522 states and 6635 transitions. [2022-02-16 13:30:46,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 6635 transitions. [2022-02-16 13:30:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:46,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:46,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:46,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:46,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-16 13:30:46,813 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:46,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1489463310, now seen corresponding path program 5 times [2022-02-16 13:30:46,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:46,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572663285] [2022-02-16 13:30:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:46,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:46,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:46,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572663285] [2022-02-16 13:30:46,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572663285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:46,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091952394] [2022-02-16 13:30:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:30:46,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:46,857 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) [2022-02-16 13:30:46,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 13:30:46,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:46,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 13:30:46,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:46,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:47,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091952394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:47,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:47,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-02-16 13:30:47,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676024730] [2022-02-16 13:30:47,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:47,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:30:47,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:30:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:30:47,025 INFO L87 Difference]: Start difference. First operand 2522 states and 6635 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:47,536 INFO L93 Difference]: Finished difference Result 3930 states and 9615 transitions. [2022-02-16 13:30:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:30:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:30:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:47,542 INFO L225 Difference]: With dead ends: 3930 [2022-02-16 13:30:47,542 INFO L226 Difference]: Without dead ends: 3920 [2022-02-16 13:30:47,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:30:47,543 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 218 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:47,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 123 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2022-02-16 13:30:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 2858. [2022-02-16 13:30:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 2.679733986699335) internal successors, (7656), 2857 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 7656 transitions. [2022-02-16 13:30:47,589 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 7656 transitions. Word has length 21 [2022-02-16 13:30:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:47,589 INFO L470 AbstractCegarLoop]: Abstraction has 2858 states and 7656 transitions. [2022-02-16 13:30:47,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 7656 transitions. [2022-02-16 13:30:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:30:47,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:47,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:47,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-16 13:30:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-16 13:30:47,793 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1507780856, now seen corresponding path program 8 times [2022-02-16 13:30:47,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:47,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592329758] [2022-02-16 13:30:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:47,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:47,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:47,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592329758] [2022-02-16 13:30:47,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592329758] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:47,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723856810] [2022-02-16 13:30:47,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:30:47,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:47,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:47,839 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) [2022-02-16 13:30:47,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 13:30:47,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:47,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:47,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:47,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:48,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723856810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:48,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:48,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-16 13:30:48,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206900994] [2022-02-16 13:30:48,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:48,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:48,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:48,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:48,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:48,040 INFO L87 Difference]: Start difference. First operand 2858 states and 7656 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-16 13:30:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:48,924 INFO L93 Difference]: Finished difference Result 3535 states and 8919 transitions. [2022-02-16 13:30:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 13:30:48,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 21 [2022-02-16 13:30:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:48,930 INFO L225 Difference]: With dead ends: 3535 [2022-02-16 13:30:48,931 INFO L226 Difference]: Without dead ends: 3535 [2022-02-16 13:30:48,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 13:30:48,932 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 181 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:48,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 131 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:30:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2022-02-16 13:30:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 2861. [2022-02-16 13:30:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2860 states have (on average 2.6793706293706294) internal successors, (7663), 2860 states have internal predecessors, (7663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 7663 transitions. [2022-02-16 13:30:48,975 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 7663 transitions. Word has length 21 [2022-02-16 13:30:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:48,975 INFO L470 AbstractCegarLoop]: Abstraction has 2861 states and 7663 transitions. [2022-02-16 13:30:48,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-16 13:30:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 7663 transitions. [2022-02-16 13:30:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 13:30:48,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:48,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:48,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:49,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-16 13:30:49,179 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -652345918, now seen corresponding path program 16 times [2022-02-16 13:30:49,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:49,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086744274] [2022-02-16 13:30:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:49,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:49,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:49,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086744274] [2022-02-16 13:30:49,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086744274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:49,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423366593] [2022-02-16 13:30:49,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:30:49,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:49,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:49,242 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) [2022-02-16 13:30:49,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 13:30:49,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:30:49,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:49,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 13:30:49,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:49,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:49,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423366593] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:49,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:49,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2022-02-16 13:30:49,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315280502] [2022-02-16 13:30:49,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:49,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:30:49,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:49,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:30:49,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:49,601 INFO L87 Difference]: Start difference. First operand 2861 states and 7663 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:49,733 INFO L93 Difference]: Finished difference Result 3916 states and 10108 transitions. [2022-02-16 13:30:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:30:49,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 13:30:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:49,743 INFO L225 Difference]: With dead ends: 3916 [2022-02-16 13:30:49,743 INFO L226 Difference]: Without dead ends: 3902 [2022-02-16 13:30:49,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:49,743 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:49,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 317 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-02-16 13:30:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3661. [2022-02-16 13:30:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3661 states, 3660 states have (on average 2.6636612021857924) internal successors, (9749), 3660 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 9749 transitions. [2022-02-16 13:30:49,811 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 9749 transitions. Word has length 23 [2022-02-16 13:30:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:49,811 INFO L470 AbstractCegarLoop]: Abstraction has 3661 states and 9749 transitions. [2022-02-16 13:30:49,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 9749 transitions. [2022-02-16 13:30:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 13:30:49,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:49,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:49,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:50,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-16 13:30:50,018 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:50,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1646109258, now seen corresponding path program 17 times [2022-02-16 13:30:50,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:50,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007228358] [2022-02-16 13:30:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:50,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:30:50,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:50,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007228358] [2022-02-16 13:30:50,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007228358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:50,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904307075] [2022-02-16 13:30:50,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:30:50,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:50,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:50,076 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) [2022-02-16 13:30:50,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 13:30:50,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:30:50,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:50,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 13:30:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:50,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:30:50,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904307075] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:50,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:50,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2022-02-16 13:30:50,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42495495] [2022-02-16 13:30:50,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:50,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:30:50,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:30:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:50,387 INFO L87 Difference]: Start difference. First operand 3661 states and 9749 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:50,485 INFO L93 Difference]: Finished difference Result 4598 states and 11789 transitions. [2022-02-16 13:30:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:30:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 13:30:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:50,493 INFO L225 Difference]: With dead ends: 4598 [2022-02-16 13:30:50,493 INFO L226 Difference]: Without dead ends: 4580 [2022-02-16 13:30:50,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:30:50,494 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 64 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:50,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 237 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2022-02-16 13:30:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 4190. [2022-02-16 13:30:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4190 states, 4189 states have (on average 2.669133444736214) internal successors, (11181), 4189 states have internal predecessors, (11181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 11181 transitions. [2022-02-16 13:30:50,553 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 11181 transitions. Word has length 23 [2022-02-16 13:30:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:50,553 INFO L470 AbstractCegarLoop]: Abstraction has 4190 states and 11181 transitions. [2022-02-16 13:30:50,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 11181 transitions. [2022-02-16 13:30:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 13:30:50,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:50,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:50,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-16 13:30:50,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:50,760 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:50,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1953423434, now seen corresponding path program 18 times [2022-02-16 13:30:50,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:50,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178212583] [2022-02-16 13:30:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:50,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:50,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:50,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178212583] [2022-02-16 13:30:50,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178212583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:50,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882255342] [2022-02-16 13:30:50,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:30:50,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:50,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:50,856 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) [2022-02-16 13:30:50,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 13:30:50,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:30:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 13:30:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:51,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:30:51,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882255342] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:51,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:51,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 12 [2022-02-16 13:30:51,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482363227] [2022-02-16 13:30:51,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:51,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:30:51,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:30:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:30:51,275 INFO L87 Difference]: Start difference. First operand 4190 states and 11181 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:51,446 INFO L93 Difference]: Finished difference Result 4929 states and 12694 transitions. [2022-02-16 13:30:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:30:51,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 13:30:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:51,454 INFO L225 Difference]: With dead ends: 4929 [2022-02-16 13:30:51,454 INFO L226 Difference]: Without dead ends: 4915 [2022-02-16 13:30:51,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:30:51,454 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:51,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 260 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:30:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2022-02-16 13:30:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4637. [2022-02-16 13:30:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.6475409836065573) internal successors, (12274), 4636 states have internal predecessors, (12274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 12274 transitions. [2022-02-16 13:30:51,514 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 12274 transitions. Word has length 23 [2022-02-16 13:30:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:51,514 INFO L470 AbstractCegarLoop]: Abstraction has 4637 states and 12274 transitions. [2022-02-16 13:30:51,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 12274 transitions. [2022-02-16 13:30:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:30:51,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:51,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:51,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:51,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:51,721 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1769917344, now seen corresponding path program 19 times [2022-02-16 13:30:51,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:51,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623006164] [2022-02-16 13:30:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:51,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:51,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:51,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623006164] [2022-02-16 13:30:51,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623006164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:51,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540175913] [2022-02-16 13:30:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:30:51,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:51,767 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) [2022-02-16 13:30:51,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-16 13:30:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:30:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:51,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:51,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540175913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:51,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:51,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 13:30:51,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262326746] [2022-02-16 13:30:51,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:51,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:30:51,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:30:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:30:51,945 INFO L87 Difference]: Start difference. First operand 4637 states and 12274 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:52,221 INFO L93 Difference]: Finished difference Result 7650 states and 19202 transitions. [2022-02-16 13:30:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:30:52,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:30:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:52,234 INFO L225 Difference]: With dead ends: 7650 [2022-02-16 13:30:52,235 INFO L226 Difference]: Without dead ends: 7650 [2022-02-16 13:30:52,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:30:52,235 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 211 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:52,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 143 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:30:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2022-02-16 13:30:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 5431. [2022-02-16 13:30:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 2.673112338858195) internal successors, (14515), 5430 states have internal predecessors, (14515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 14515 transitions. [2022-02-16 13:30:52,324 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 14515 transitions. Word has length 25 [2022-02-16 13:30:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:52,325 INFO L470 AbstractCegarLoop]: Abstraction has 5431 states and 14515 transitions. [2022-02-16 13:30:52,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 14515 transitions. [2022-02-16 13:30:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:30:52,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:52,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:52,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:52,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:52,533 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:52,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1323705120, now seen corresponding path program 20 times [2022-02-16 13:30:52,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:52,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182162767] [2022-02-16 13:30:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:52,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:52,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:52,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182162767] [2022-02-16 13:30:52,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182162767] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:52,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312540947] [2022-02-16 13:30:52,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:30:52,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:52,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:52,592 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) [2022-02-16 13:30:52,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-16 13:30:52,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:30:52,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:52,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:30:52,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:52,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:52,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312540947] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:52,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:52,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:30:52,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349132186] [2022-02-16 13:30:52,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:52,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:30:52,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:30:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:30:52,886 INFO L87 Difference]: Start difference. First operand 5431 states and 14515 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:55,045 INFO L93 Difference]: Finished difference Result 8531 states and 20539 transitions. [2022-02-16 13:30:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-16 13:30:55,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:30:55,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:55,061 INFO L225 Difference]: With dead ends: 8531 [2022-02-16 13:30:55,062 INFO L226 Difference]: Without dead ends: 8531 [2022-02-16 13:30:55,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5016 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3030, Invalid=9626, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 13:30:55,065 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 471 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:55,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 283 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:30:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8531 states. [2022-02-16 13:30:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8531 to 5459. [2022-02-16 13:30:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5459 states, 5458 states have (on average 2.6857823378526935) internal successors, (14659), 5458 states have internal predecessors, (14659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5459 states to 5459 states and 14659 transitions. [2022-02-16 13:30:55,181 INFO L78 Accepts]: Start accepts. Automaton has 5459 states and 14659 transitions. Word has length 25 [2022-02-16 13:30:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:55,181 INFO L470 AbstractCegarLoop]: Abstraction has 5459 states and 14659 transitions. [2022-02-16 13:30:55,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 5459 states and 14659 transitions. [2022-02-16 13:30:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:30:55,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:55,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:55,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-16 13:30:55,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-02-16 13:30:55,390 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1259168164, now seen corresponding path program 6 times [2022-02-16 13:30:55,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:55,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206658879] [2022-02-16 13:30:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:55,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:55,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:55,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206658879] [2022-02-16 13:30:55,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206658879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:55,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343741872] [2022-02-16 13:30:55,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:30:55,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:55,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:55,442 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) [2022-02-16 13:30:55,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-16 13:30:55,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:30:55,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:30:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:55,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:55,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343741872] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:55,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:55,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 13:30:55,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395860809] [2022-02-16 13:30:55,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:55,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:30:55,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:30:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:30:55,723 INFO L87 Difference]: Start difference. First operand 5459 states and 14659 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:57,179 INFO L93 Difference]: Finished difference Result 12484 states and 31172 transitions. [2022-02-16 13:30:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-16 13:30:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:30:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:57,215 INFO L225 Difference]: With dead ends: 12484 [2022-02-16 13:30:57,215 INFO L226 Difference]: Without dead ends: 12467 [2022-02-16 13:30:57,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1214, Invalid=4638, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 13:30:57,217 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 343 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:57,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 289 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:30:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12467 states. [2022-02-16 13:30:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12467 to 7199. [2022-02-16 13:30:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 7198 states have (on average 2.7675743262017227) internal successors, (19921), 7198 states have internal predecessors, (19921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 19921 transitions. [2022-02-16 13:30:57,399 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 19921 transitions. Word has length 25 [2022-02-16 13:30:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:57,399 INFO L470 AbstractCegarLoop]: Abstraction has 7199 states and 19921 transitions. [2022-02-16 13:30:57,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 19921 transitions. [2022-02-16 13:30:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:30:57,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:57,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:57,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-16 13:30:57,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-16 13:30:57,627 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1988916748, now seen corresponding path program 7 times [2022-02-16 13:30:57,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:57,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712211915] [2022-02-16 13:30:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:57,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:57,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:57,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712211915] [2022-02-16 13:30:57,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712211915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:57,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096454632] [2022-02-16 13:30:57,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:30:57,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:57,670 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) [2022-02-16 13:30:57,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-16 13:30:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:30:57,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:30:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:57,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:30:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:57,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096454632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:30:57,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:30:57,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 13:30:57,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351897328] [2022-02-16 13:30:57,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:30:57,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:30:57,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:30:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:30:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:30:57,933 INFO L87 Difference]: Start difference. First operand 7199 states and 19921 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:30:59,301 INFO L93 Difference]: Finished difference Result 14675 states and 36944 transitions. [2022-02-16 13:30:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 13:30:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:30:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:30:59,331 INFO L225 Difference]: With dead ends: 14675 [2022-02-16 13:30:59,331 INFO L226 Difference]: Without dead ends: 14671 [2022-02-16 13:30:59,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1008, Invalid=3822, Unknown=0, NotChecked=0, Total=4830 [2022-02-16 13:30:59,332 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 254 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:30:59,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 335 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:30:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14671 states. [2022-02-16 13:30:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14671 to 6745. [2022-02-16 13:30:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6744 states have (on average 2.7562277580071175) internal successors, (18588), 6744 states have internal predecessors, (18588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 18588 transitions. [2022-02-16 13:30:59,503 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 18588 transitions. Word has length 25 [2022-02-16 13:30:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:30:59,503 INFO L470 AbstractCegarLoop]: Abstraction has 6745 states and 18588 transitions. [2022-02-16 13:30:59,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:30:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 18588 transitions. [2022-02-16 13:30:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:30:59,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:30:59,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:30:59,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-16 13:30:59,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-16 13:30:59,741 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:30:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:30:59,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1899715936, now seen corresponding path program 21 times [2022-02-16 13:30:59,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:30:59,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848456535] [2022-02-16 13:30:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:30:59,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:30:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:30:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:30:59,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:30:59,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848456535] [2022-02-16 13:30:59,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848456535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:30:59,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65353494] [2022-02-16 13:30:59,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:30:59,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:30:59,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:30:59,791 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) [2022-02-16 13:30:59,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-16 13:30:59,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:30:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:30:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:30:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:00,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:00,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65353494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:00,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:00,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:31:00,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863537519] [2022-02-16 13:31:00,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:00,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:31:00,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:00,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:31:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:31:00,063 INFO L87 Difference]: Start difference. First operand 6745 states and 18588 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:01,357 INFO L93 Difference]: Finished difference Result 9104 states and 22950 transitions. [2022-02-16 13:31:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-16 13:31:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:01,372 INFO L225 Difference]: With dead ends: 9104 [2022-02-16 13:31:01,372 INFO L226 Difference]: Without dead ends: 9096 [2022-02-16 13:31:01,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1288, Invalid=4262, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 13:31:01,373 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 493 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:01,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 228 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9096 states. [2022-02-16 13:31:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9096 to 6935. [2022-02-16 13:31:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6935 states, 6934 states have (on average 2.7422843957311795) internal successors, (19015), 6934 states have internal predecessors, (19015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 19015 transitions. [2022-02-16 13:31:01,491 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 19015 transitions. Word has length 25 [2022-02-16 13:31:01,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:01,492 INFO L470 AbstractCegarLoop]: Abstraction has 6935 states and 19015 transitions. [2022-02-16 13:31:01,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 19015 transitions. [2022-02-16 13:31:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:01,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:01,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:01,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-16 13:31:01,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-16 13:31:01,703 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 93746272, now seen corresponding path program 22 times [2022-02-16 13:31:01,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:01,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280036071] [2022-02-16 13:31:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:01,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:01,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:01,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280036071] [2022-02-16 13:31:01,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280036071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:01,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145881682] [2022-02-16 13:31:01,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:31:01,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:01,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:01,760 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) [2022-02-16 13:31:01,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-16 13:31:01,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:31:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:02,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:02,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145881682] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:02,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:02,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:31:02,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921285681] [2022-02-16 13:31:02,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:02,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:31:02,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:02,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:31:02,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:31:02,084 INFO L87 Difference]: Start difference. First operand 6935 states and 19015 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:03,178 INFO L93 Difference]: Finished difference Result 9035 states and 22798 transitions. [2022-02-16 13:31:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 13:31:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:03,197 INFO L225 Difference]: With dead ends: 9035 [2022-02-16 13:31:03,197 INFO L226 Difference]: Without dead ends: 9023 [2022-02-16 13:31:03,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1133, Invalid=3697, Unknown=0, NotChecked=0, Total=4830 [2022-02-16 13:31:03,198 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 415 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:03,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 208 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9023 states. [2022-02-16 13:31:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9023 to 6984. [2022-02-16 13:31:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6984 states, 6983 states have (on average 2.7375053701847345) internal successors, (19116), 6983 states have internal predecessors, (19116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 19116 transitions. [2022-02-16 13:31:03,398 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 19116 transitions. Word has length 25 [2022-02-16 13:31:03,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:03,399 INFO L470 AbstractCegarLoop]: Abstraction has 6984 states and 19116 transitions. [2022-02-16 13:31:03,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 19116 transitions. [2022-02-16 13:31:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:03,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:03,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:03,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-16 13:31:03,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:03,611 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash 708602148, now seen corresponding path program 23 times [2022-02-16 13:31:03,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:03,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306249163] [2022-02-16 13:31:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:03,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:03,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:03,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306249163] [2022-02-16 13:31:03,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306249163] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:03,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346771961] [2022-02-16 13:31:03,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:31:03,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:03,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:03,652 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) [2022-02-16 13:31:03,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-16 13:31:03,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:31:03,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:03,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:03,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:03,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346771961] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:03,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:03,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-16 13:31:03,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302537648] [2022-02-16 13:31:03,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:03,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:03,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:03,911 INFO L87 Difference]: Start difference. First operand 6984 states and 19116 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2022-02-16 13:31:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:05,739 INFO L93 Difference]: Finished difference Result 12890 states and 32590 transitions. [2022-02-16 13:31:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-16 13:31:05,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 25 [2022-02-16 13:31:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:05,773 INFO L225 Difference]: With dead ends: 12890 [2022-02-16 13:31:05,773 INFO L226 Difference]: Without dead ends: 12890 [2022-02-16 13:31:05,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2512, Invalid=7790, Unknown=0, NotChecked=0, Total=10302 [2022-02-16 13:31:05,775 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 520 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:05,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 175 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:31:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2022-02-16 13:31:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 8299. [2022-02-16 13:31:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8299 states, 8298 states have (on average 2.8123644251626896) internal successors, (23337), 8298 states have internal predecessors, (23337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8299 states to 8299 states and 23337 transitions. [2022-02-16 13:31:05,998 INFO L78 Accepts]: Start accepts. Automaton has 8299 states and 23337 transitions. Word has length 25 [2022-02-16 13:31:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:05,999 INFO L470 AbstractCegarLoop]: Abstraction has 8299 states and 23337 transitions. [2022-02-16 13:31:05,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2022-02-16 13:31:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 8299 states and 23337 transitions. [2022-02-16 13:31:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:06,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:06,011 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:06,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-16 13:31:06,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-16 13:31:06,219 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash -580119068, now seen corresponding path program 24 times [2022-02-16 13:31:06,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:06,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926827791] [2022-02-16 13:31:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:06,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:06,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:06,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926827791] [2022-02-16 13:31:06,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926827791] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:06,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074159912] [2022-02-16 13:31:06,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:31:06,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:06,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:06,267 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) [2022-02-16 13:31:06,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-16 13:31:06,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:31:06,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:06,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:06,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:06,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:06,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074159912] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:06,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:06,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-16 13:31:06,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59851909] [2022-02-16 13:31:06,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:06,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:06,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:06,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:06,541 INFO L87 Difference]: Start difference. First operand 8299 states and 23337 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:08,078 INFO L93 Difference]: Finished difference Result 12439 states and 32001 transitions. [2022-02-16 13:31:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-16 13:31:08,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:08,107 INFO L225 Difference]: With dead ends: 12439 [2022-02-16 13:31:08,107 INFO L226 Difference]: Without dead ends: 12436 [2022-02-16 13:31:08,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1815, Invalid=4991, Unknown=0, NotChecked=0, Total=6806 [2022-02-16 13:31:08,109 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 439 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:08,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 187 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12436 states. [2022-02-16 13:31:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12436 to 8059. [2022-02-16 13:31:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8059 states, 8058 states have (on average 2.7903946388682055) internal successors, (22485), 8058 states have internal predecessors, (22485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8059 states to 8059 states and 22485 transitions. [2022-02-16 13:31:08,330 INFO L78 Accepts]: Start accepts. Automaton has 8059 states and 22485 transitions. Word has length 25 [2022-02-16 13:31:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:08,330 INFO L470 AbstractCegarLoop]: Abstraction has 8059 states and 22485 transitions. [2022-02-16 13:31:08,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 8059 states and 22485 transitions. [2022-02-16 13:31:08,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:08,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:08,343 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:08,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-16 13:31:08,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-16 13:31:08,543 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1560429592, now seen corresponding path program 25 times [2022-02-16 13:31:08,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:08,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016318871] [2022-02-16 13:31:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:08,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:08,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:08,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016318871] [2022-02-16 13:31:08,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016318871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:08,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371940031] [2022-02-16 13:31:08,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:31:08,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:08,592 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) [2022-02-16 13:31:08,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-16 13:31:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:31:08,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:08,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:08,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371940031] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:08,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:08,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-02-16 13:31:08,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433058205] [2022-02-16 13:31:08,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:08,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 13:31:08,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 13:31:08,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:31:08,786 INFO L87 Difference]: Start difference. First operand 8059 states and 22485 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:08,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:08,972 INFO L93 Difference]: Finished difference Result 9645 states and 25513 transitions. [2022-02-16 13:31:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:31:08,973 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:08,991 INFO L225 Difference]: With dead ends: 9645 [2022-02-16 13:31:08,991 INFO L226 Difference]: Without dead ends: 9640 [2022-02-16 13:31:08,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:31:08,992 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:08,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 63 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:31:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9640 states. [2022-02-16 13:31:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9640 to 7839. [2022-02-16 13:31:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 7838 states have (on average 2.78540443990814) internal successors, (21832), 7838 states have internal predecessors, (21832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 21832 transitions. [2022-02-16 13:31:09,119 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 21832 transitions. Word has length 25 [2022-02-16 13:31:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:09,119 INFO L470 AbstractCegarLoop]: Abstraction has 7839 states and 21832 transitions. [2022-02-16 13:31:09,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 21832 transitions. [2022-02-16 13:31:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:09,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:09,130 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:09,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-16 13:31:09,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-02-16 13:31:09,331 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash -521356700, now seen corresponding path program 26 times [2022-02-16 13:31:09,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:09,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043501077] [2022-02-16 13:31:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:09,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:09,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:09,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043501077] [2022-02-16 13:31:09,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043501077] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:09,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521271049] [2022-02-16 13:31:09,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:31:09,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:09,382 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) [2022-02-16 13:31:09,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-16 13:31:09,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:31:09,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:09,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:09,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:09,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:09,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521271049] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:09,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:09,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-02-16 13:31:09,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630328308] [2022-02-16 13:31:09,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:09,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:09,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:09,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:09,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:09,680 INFO L87 Difference]: Start difference. First operand 7839 states and 21832 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:10,665 INFO L93 Difference]: Finished difference Result 10879 states and 28104 transitions. [2022-02-16 13:31:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-16 13:31:10,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:10,683 INFO L225 Difference]: With dead ends: 10879 [2022-02-16 13:31:10,684 INFO L226 Difference]: Without dead ends: 10868 [2022-02-16 13:31:10,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=814, Invalid=2608, Unknown=0, NotChecked=0, Total=3422 [2022-02-16 13:31:10,684 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 400 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:10,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 159 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10868 states. [2022-02-16 13:31:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10868 to 8380. [2022-02-16 13:31:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8380 states, 8379 states have (on average 2.79937940088316) internal successors, (23456), 8379 states have internal predecessors, (23456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8380 states to 8380 states and 23456 transitions. [2022-02-16 13:31:10,844 INFO L78 Accepts]: Start accepts. Automaton has 8380 states and 23456 transitions. Word has length 25 [2022-02-16 13:31:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:10,844 INFO L470 AbstractCegarLoop]: Abstraction has 8380 states and 23456 transitions. [2022-02-16 13:31:10,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 8380 states and 23456 transitions. [2022-02-16 13:31:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:10,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:10,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:10,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-16 13:31:11,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:11,058 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1117127524, now seen corresponding path program 27 times [2022-02-16 13:31:11,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:11,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383762125] [2022-02-16 13:31:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:11,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:11,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:11,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383762125] [2022-02-16 13:31:11,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383762125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:11,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448141718] [2022-02-16 13:31:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:31:11,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:11,111 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) [2022-02-16 13:31:11,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-16 13:31:11,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:31:11,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:11,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:11,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448141718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:11,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:11,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-02-16 13:31:11,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308307622] [2022-02-16 13:31:11,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:11,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:11,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:11,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:11,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:11,416 INFO L87 Difference]: Start difference. First operand 8380 states and 23456 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:12,909 INFO L93 Difference]: Finished difference Result 11019 states and 28307 transitions. [2022-02-16 13:31:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-16 13:31:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:12,932 INFO L225 Difference]: With dead ends: 11019 [2022-02-16 13:31:12,932 INFO L226 Difference]: Without dead ends: 11017 [2022-02-16 13:31:12,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1632, Invalid=4848, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 13:31:12,934 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 389 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:12,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 214 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11017 states. [2022-02-16 13:31:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11017 to 8323. [2022-02-16 13:31:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 2.7886325402547465) internal successors, (23207), 8322 states have internal predecessors, (23207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 23207 transitions. [2022-02-16 13:31:13,122 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 23207 transitions. Word has length 25 [2022-02-16 13:31:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:13,122 INFO L470 AbstractCegarLoop]: Abstraction has 8323 states and 23207 transitions. [2022-02-16 13:31:13,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 23207 transitions. [2022-02-16 13:31:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:13,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:13,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:13,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-16 13:31:13,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:13,336 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 778242148, now seen corresponding path program 28 times [2022-02-16 13:31:13,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:13,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764048510] [2022-02-16 13:31:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:13,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:13,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:13,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764048510] [2022-02-16 13:31:13,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764048510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:13,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743490368] [2022-02-16 13:31:13,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:31:13,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:13,391 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) [2022-02-16 13:31:13,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-16 13:31:13,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:31:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:13,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:13,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:13,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743490368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:13,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:13,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:31:13,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531196407] [2022-02-16 13:31:13,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:13,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:31:13,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:31:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:31:13,674 INFO L87 Difference]: Start difference. First operand 8323 states and 23207 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:14,827 INFO L93 Difference]: Finished difference Result 10075 states and 26219 transitions. [2022-02-16 13:31:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-16 13:31:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:14,844 INFO L225 Difference]: With dead ends: 10075 [2022-02-16 13:31:14,844 INFO L226 Difference]: Without dead ends: 10061 [2022-02-16 13:31:14,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1184, Invalid=3928, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 13:31:14,846 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 401 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:14,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 182 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:14,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10061 states. [2022-02-16 13:31:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10061 to 8416. [2022-02-16 13:31:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8416 states, 8415 states have (on average 2.7830065359477123) internal successors, (23419), 8415 states have internal predecessors, (23419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8416 states to 8416 states and 23419 transitions. [2022-02-16 13:31:14,986 INFO L78 Accepts]: Start accepts. Automaton has 8416 states and 23419 transitions. Word has length 25 [2022-02-16 13:31:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:14,986 INFO L470 AbstractCegarLoop]: Abstraction has 8416 states and 23419 transitions. [2022-02-16 13:31:14,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8416 states and 23419 transitions. [2022-02-16 13:31:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:14,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:14,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:15,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-16 13:31:15,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:15,199 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash -891416220, now seen corresponding path program 29 times [2022-02-16 13:31:15,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:15,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554037750] [2022-02-16 13:31:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:15,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:15,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:15,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554037750] [2022-02-16 13:31:15,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554037750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:15,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806623346] [2022-02-16 13:31:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:31:15,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:15,248 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) [2022-02-16 13:31:15,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-16 13:31:15,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:31:15,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:15,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:15,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:15,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806623346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:15,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:15,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:31:15,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597607028] [2022-02-16 13:31:15,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:15,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:31:15,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:31:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:31:15,549 INFO L87 Difference]: Start difference. First operand 8416 states and 23419 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:17,103 INFO L93 Difference]: Finished difference Result 10201 states and 26440 transitions. [2022-02-16 13:31:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-16 13:31:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:17,123 INFO L225 Difference]: With dead ends: 10201 [2022-02-16 13:31:17,123 INFO L226 Difference]: Without dead ends: 10182 [2022-02-16 13:31:17,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2644 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1741, Invalid=5741, Unknown=0, NotChecked=0, Total=7482 [2022-02-16 13:31:17,125 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 511 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:17,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 218 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10182 states. [2022-02-16 13:31:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10182 to 8527. [2022-02-16 13:31:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8527 states, 8526 states have (on average 2.7742200328407227) internal successors, (23653), 8526 states have internal predecessors, (23653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8527 states to 8527 states and 23653 transitions. [2022-02-16 13:31:17,278 INFO L78 Accepts]: Start accepts. Automaton has 8527 states and 23653 transitions. Word has length 25 [2022-02-16 13:31:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:17,278 INFO L470 AbstractCegarLoop]: Abstraction has 8527 states and 23653 transitions. [2022-02-16 13:31:17,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 8527 states and 23653 transitions. [2022-02-16 13:31:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:17,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:17,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:17,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-16 13:31:17,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-16 13:31:17,491 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash 747068004, now seen corresponding path program 30 times [2022-02-16 13:31:17,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:17,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236237885] [2022-02-16 13:31:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:17,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:17,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:17,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236237885] [2022-02-16 13:31:17,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236237885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:17,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146179442] [2022-02-16 13:31:17,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:31:17,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:17,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:17,542 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) [2022-02-16 13:31:17,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-16 13:31:17,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:31:17,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:17,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:17,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:17,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:17,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146179442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:17,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:17,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:31:17,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692484592] [2022-02-16 13:31:17,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:17,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:31:17,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:31:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:31:17,841 INFO L87 Difference]: Start difference. First operand 8527 states and 23653 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:19,645 INFO L93 Difference]: Finished difference Result 10304 states and 26678 transitions. [2022-02-16 13:31:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-16 13:31:19,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:19,664 INFO L225 Difference]: With dead ends: 10304 [2022-02-16 13:31:19,664 INFO L226 Difference]: Without dead ends: 10304 [2022-02-16 13:31:19,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2247, Invalid=6683, Unknown=0, NotChecked=0, Total=8930 [2022-02-16 13:31:19,666 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 443 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:19,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 270 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2022-02-16 13:31:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 8511. [2022-02-16 13:31:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8511 states, 8510 states have (on average 2.7747356051703878) internal successors, (23613), 8510 states have internal predecessors, (23613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 23613 transitions. [2022-02-16 13:31:19,849 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 23613 transitions. Word has length 25 [2022-02-16 13:31:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:19,849 INFO L470 AbstractCegarLoop]: Abstraction has 8511 states and 23613 transitions. [2022-02-16 13:31:19,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 23613 transitions. [2022-02-16 13:31:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:19,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:19,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:19,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-16 13:31:20,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-16 13:31:20,062 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:20,063 INFO L85 PathProgramCache]: Analyzing trace with hash 80719400, now seen corresponding path program 31 times [2022-02-16 13:31:20,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:20,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39442757] [2022-02-16 13:31:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:20,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:20,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:20,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39442757] [2022-02-16 13:31:20,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39442757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:20,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637758718] [2022-02-16 13:31:20,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:31:20,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:20,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:20,110 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) [2022-02-16 13:31:20,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-16 13:31:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:20,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:31:20,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:20,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:20,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637758718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:20,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:20,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-16 13:31:20,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228823380] [2022-02-16 13:31:20,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:20,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:31:20,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:31:20,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:31:20,319 INFO L87 Difference]: Start difference. First operand 8511 states and 23613 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:20,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:20,660 INFO L93 Difference]: Finished difference Result 18946 states and 50018 transitions. [2022-02-16 13:31:20,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:31:20,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:20,708 INFO L225 Difference]: With dead ends: 18946 [2022-02-16 13:31:20,708 INFO L226 Difference]: Without dead ends: 18946 [2022-02-16 13:31:20,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:31:20,709 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 216 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:20,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 107 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:31:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18946 states. [2022-02-16 13:31:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18946 to 12811. [2022-02-16 13:31:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12811 states, 12810 states have (on average 2.87416081186573) internal successors, (36818), 12810 states have internal predecessors, (36818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12811 states to 12811 states and 36818 transitions. [2022-02-16 13:31:21,012 INFO L78 Accepts]: Start accepts. Automaton has 12811 states and 36818 transitions. Word has length 25 [2022-02-16 13:31:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:21,012 INFO L470 AbstractCegarLoop]: Abstraction has 12811 states and 36818 transitions. [2022-02-16 13:31:21,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 12811 states and 36818 transitions. [2022-02-16 13:31:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:21,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:21,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:21,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-16 13:31:21,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-16 13:31:21,231 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1769028184, now seen corresponding path program 32 times [2022-02-16 13:31:21,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:21,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352440528] [2022-02-16 13:31:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:21,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:21,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:21,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352440528] [2022-02-16 13:31:21,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352440528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:21,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427438231] [2022-02-16 13:31:21,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:31:21,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:21,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:21,285 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) [2022-02-16 13:31:21,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-16 13:31:21,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:31:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:21,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:21,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:21,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:21,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427438231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:21,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:21,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-16 13:31:21,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104698359] [2022-02-16 13:31:21,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:21,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:31:21,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:31:21,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:31:21,591 INFO L87 Difference]: Start difference. First operand 12811 states and 36818 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:23,466 INFO L93 Difference]: Finished difference Result 15293 states and 41771 transitions. [2022-02-16 13:31:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-16 13:31:23,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:23,505 INFO L225 Difference]: With dead ends: 15293 [2022-02-16 13:31:23,505 INFO L226 Difference]: Without dead ends: 15293 [2022-02-16 13:31:23,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2098, Invalid=7802, Unknown=0, NotChecked=0, Total=9900 [2022-02-16 13:31:23,507 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 322 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:23,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 216 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:31:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15293 states. [2022-02-16 13:31:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15293 to 12930. [2022-02-16 13:31:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12930 states, 12929 states have (on average 2.874932322685436) internal successors, (37170), 12929 states have internal predecessors, (37170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12930 states to 12930 states and 37170 transitions. [2022-02-16 13:31:23,833 INFO L78 Accepts]: Start accepts. Automaton has 12930 states and 37170 transitions. Word has length 25 [2022-02-16 13:31:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:23,833 INFO L470 AbstractCegarLoop]: Abstraction has 12930 states and 37170 transitions. [2022-02-16 13:31:23,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 12930 states and 37170 transitions. [2022-02-16 13:31:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:23,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:23,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:23,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-16 13:31:24,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-02-16 13:31:24,056 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash 915484272, now seen corresponding path program 33 times [2022-02-16 13:31:24,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:24,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596877999] [2022-02-16 13:31:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:24,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:24,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:24,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596877999] [2022-02-16 13:31:24,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596877999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:24,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473687647] [2022-02-16 13:31:24,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:31:24,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:24,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:24,099 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) [2022-02-16 13:31:24,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-16 13:31:24,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-16 13:31:24,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:24,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:31:24,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:24,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:24,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473687647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:24,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:24,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-02-16 13:31:24,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130660] [2022-02-16 13:31:24,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:24,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 13:31:24,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 13:31:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:31:24,252 INFO L87 Difference]: Start difference. First operand 12930 states and 37170 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:24,513 INFO L93 Difference]: Finished difference Result 16185 states and 43508 transitions. [2022-02-16 13:31:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:31:24,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:24,553 INFO L225 Difference]: With dead ends: 16185 [2022-02-16 13:31:24,553 INFO L226 Difference]: Without dead ends: 16172 [2022-02-16 13:31:24,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:31:24,554 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 169 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:24,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 66 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:31:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16172 states. [2022-02-16 13:31:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16172 to 11605. [2022-02-16 13:31:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11605 states, 11604 states have (on average 2.846432264736298) internal successors, (33030), 11604 states have internal predecessors, (33030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11605 states to 11605 states and 33030 transitions. [2022-02-16 13:31:24,855 INFO L78 Accepts]: Start accepts. Automaton has 11605 states and 33030 transitions. Word has length 25 [2022-02-16 13:31:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:24,855 INFO L470 AbstractCegarLoop]: Abstraction has 11605 states and 33030 transitions. [2022-02-16 13:31:24,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 11605 states and 33030 transitions. [2022-02-16 13:31:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:24,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:24,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:24,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-16 13:31:25,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-16 13:31:25,075 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash 496845924, now seen corresponding path program 34 times [2022-02-16 13:31:25,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:25,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045092118] [2022-02-16 13:31:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:25,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:25,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:25,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045092118] [2022-02-16 13:31:25,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045092118] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:25,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926813447] [2022-02-16 13:31:25,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:31:25,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:25,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:25,123 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) [2022-02-16 13:31:25,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-16 13:31:25,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:31:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:25,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:25,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926813447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:25,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:25,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-16 13:31:25,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304505242] [2022-02-16 13:31:25,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:25,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:31:25,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:31:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:31:25,419 INFO L87 Difference]: Start difference. First operand 11605 states and 33030 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:26,345 INFO L93 Difference]: Finished difference Result 13118 states and 35939 transitions. [2022-02-16 13:31:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 13:31:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:26,375 INFO L225 Difference]: With dead ends: 13118 [2022-02-16 13:31:26,375 INFO L226 Difference]: Without dead ends: 13112 [2022-02-16 13:31:26,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=707, Invalid=2263, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 13:31:26,376 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 219 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:26,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 170 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13112 states. [2022-02-16 13:31:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13112 to 11850. [2022-02-16 13:31:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11850 states, 11849 states have (on average 2.8446282386699298) internal successors, (33706), 11849 states have internal predecessors, (33706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 33706 transitions. [2022-02-16 13:31:26,697 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 33706 transitions. Word has length 25 [2022-02-16 13:31:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:26,697 INFO L470 AbstractCegarLoop]: Abstraction has 11850 states and 33706 transitions. [2022-02-16 13:31:26,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 33706 transitions. [2022-02-16 13:31:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:26,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:26,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:26,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-16 13:31:26,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-16 13:31:26,918 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1909902692, now seen corresponding path program 35 times [2022-02-16 13:31:26,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:26,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923735813] [2022-02-16 13:31:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:26,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:26,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:26,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923735813] [2022-02-16 13:31:26,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923735813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:26,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152494298] [2022-02-16 13:31:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:31:26,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:26,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:26,967 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) [2022-02-16 13:31:26,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-16 13:31:26,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:31:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:27,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:27,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152494298] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:27,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:27,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-02-16 13:31:27,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142832046] [2022-02-16 13:31:27,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:27,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:27,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:27,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:27,273 INFO L87 Difference]: Start difference. First operand 11850 states and 33706 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:28,511 INFO L93 Difference]: Finished difference Result 13161 states and 36095 transitions. [2022-02-16 13:31:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 13:31:28,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:28,542 INFO L225 Difference]: With dead ends: 13161 [2022-02-16 13:31:28,542 INFO L226 Difference]: Without dead ends: 13155 [2022-02-16 13:31:28,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1088, Invalid=3468, Unknown=0, NotChecked=0, Total=4556 [2022-02-16 13:31:28,543 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 245 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:28,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 185 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2022-02-16 13:31:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 12209. [2022-02-16 13:31:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12209 states, 12208 states have (on average 2.831913499344692) internal successors, (34572), 12208 states have internal predecessors, (34572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 34572 transitions. [2022-02-16 13:31:28,837 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 34572 transitions. Word has length 25 [2022-02-16 13:31:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:28,837 INFO L470 AbstractCegarLoop]: Abstraction has 12209 states and 34572 transitions. [2022-02-16 13:31:28,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 34572 transitions. [2022-02-16 13:31:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:28,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:28,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:28,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-16 13:31:29,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:29,063 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:29,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1945950500, now seen corresponding path program 8 times [2022-02-16 13:31:29,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:29,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463231341] [2022-02-16 13:31:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:29,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:29,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:29,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463231341] [2022-02-16 13:31:29,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463231341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:29,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313558158] [2022-02-16 13:31:29,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:31:29,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:29,120 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) [2022-02-16 13:31:29,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-16 13:31:29,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:31:29,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:29,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:29,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:29,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313558158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:29,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:29,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:31:29,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57424545] [2022-02-16 13:31:29,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:29,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:31:29,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:31:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:31:29,407 INFO L87 Difference]: Start difference. First operand 12209 states and 34572 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:30,715 INFO L93 Difference]: Finished difference Result 13544 states and 36848 transitions. [2022-02-16 13:31:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-16 13:31:30,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:30,752 INFO L225 Difference]: With dead ends: 13544 [2022-02-16 13:31:30,752 INFO L226 Difference]: Without dead ends: 13544 [2022-02-16 13:31:30,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1140, Invalid=3416, Unknown=0, NotChecked=0, Total=4556 [2022-02-16 13:31:30,754 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 298 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:30,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 208 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13544 states. [2022-02-16 13:31:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13544 to 12433. [2022-02-16 13:31:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12433 states, 12432 states have (on average 2.8202220077220077) internal successors, (35061), 12432 states have internal predecessors, (35061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12433 states to 12433 states and 35061 transitions. [2022-02-16 13:31:31,070 INFO L78 Accepts]: Start accepts. Automaton has 12433 states and 35061 transitions. Word has length 25 [2022-02-16 13:31:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:31,070 INFO L470 AbstractCegarLoop]: Abstraction has 12433 states and 35061 transitions. [2022-02-16 13:31:31,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 12433 states and 35061 transitions. [2022-02-16 13:31:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:31,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:31,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:31,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-16 13:31:31,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:31,291 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash 55477928, now seen corresponding path program 9 times [2022-02-16 13:31:31,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:31,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011379202] [2022-02-16 13:31:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:31,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:31,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:31,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011379202] [2022-02-16 13:31:31,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011379202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:31,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421556538] [2022-02-16 13:31:31,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:31:31,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:31,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:31,366 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) [2022-02-16 13:31:31,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-16 13:31:31,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:31:31,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:31,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:31:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:31,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:31,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421556538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:31,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:31,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-16 13:31:31,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231503633] [2022-02-16 13:31:31,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:31,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:31,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:31,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:31,673 INFO L87 Difference]: Start difference. First operand 12433 states and 35061 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:33,019 INFO L93 Difference]: Finished difference Result 30251 states and 80441 transitions. [2022-02-16 13:31:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-16 13:31:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:33,112 INFO L225 Difference]: With dead ends: 30251 [2022-02-16 13:31:33,112 INFO L226 Difference]: Without dead ends: 30226 [2022-02-16 13:31:33,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2022-02-16 13:31:33,113 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 385 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:33,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 267 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30226 states. [2022-02-16 13:31:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30226 to 16003. [2022-02-16 13:31:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16003 states, 16002 states have (on average 2.8773903262092237) internal successors, (46044), 16002 states have internal predecessors, (46044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16003 states to 16003 states and 46044 transitions. [2022-02-16 13:31:33,705 INFO L78 Accepts]: Start accepts. Automaton has 16003 states and 46044 transitions. Word has length 25 [2022-02-16 13:31:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:33,705 INFO L470 AbstractCegarLoop]: Abstraction has 16003 states and 46044 transitions. [2022-02-16 13:31:33,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 16003 states and 46044 transitions. [2022-02-16 13:31:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:33,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:33,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:33,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-16 13:31:33,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:33,939 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash -80511628, now seen corresponding path program 10 times [2022-02-16 13:31:33,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:33,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562467582] [2022-02-16 13:31:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:33,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:34,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:34,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562467582] [2022-02-16 13:31:34,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562467582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:34,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955401069] [2022-02-16 13:31:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:31:34,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:34,012 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) [2022-02-16 13:31:34,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-16 13:31:34,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:31:34,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:31:34,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:34,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:34,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955401069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:34,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:34,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-16 13:31:34,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971723358] [2022-02-16 13:31:34,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:34,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:31:34,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:34,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:31:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:31:34,309 INFO L87 Difference]: Start difference. First operand 16003 states and 46044 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:35,653 INFO L93 Difference]: Finished difference Result 36442 states and 96097 transitions. [2022-02-16 13:31:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-16 13:31:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:35,735 INFO L225 Difference]: With dead ends: 36442 [2022-02-16 13:31:35,736 INFO L226 Difference]: Without dead ends: 36437 [2022-02-16 13:31:35,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 13:31:35,736 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 378 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:35,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 248 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36437 states. [2022-02-16 13:31:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36437 to 21018. [2022-02-16 13:31:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21018 states, 21017 states have (on average 2.8762430413474807) internal successors, (60450), 21017 states have internal predecessors, (60450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21018 states to 21018 states and 60450 transitions. [2022-02-16 13:31:36,258 INFO L78 Accepts]: Start accepts. Automaton has 21018 states and 60450 transitions. Word has length 25 [2022-02-16 13:31:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:36,258 INFO L470 AbstractCegarLoop]: Abstraction has 21018 states and 60450 transitions. [2022-02-16 13:31:36,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 21018 states and 60450 transitions. [2022-02-16 13:31:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:36,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:36,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:36,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-16 13:31:36,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-02-16 13:31:36,491 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -731043408, now seen corresponding path program 11 times [2022-02-16 13:31:36,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:36,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480068662] [2022-02-16 13:31:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:36,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:36,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:36,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480068662] [2022-02-16 13:31:36,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480068662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:36,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388989424] [2022-02-16 13:31:36,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:31:36,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:36,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:36,539 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) [2022-02-16 13:31:36,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-16 13:31:36,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:31:36,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:36,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:36,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:36,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:31:36,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388989424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:36,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:36,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-02-16 13:31:36,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447483982] [2022-02-16 13:31:36,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:36,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:36,857 INFO L87 Difference]: Start difference. First operand 21018 states and 60450 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:37,843 INFO L93 Difference]: Finished difference Result 22087 states and 62160 transitions. [2022-02-16 13:31:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-16 13:31:37,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:37,901 INFO L225 Difference]: With dead ends: 22087 [2022-02-16 13:31:37,901 INFO L226 Difference]: Without dead ends: 22075 [2022-02-16 13:31:37,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=810, Invalid=2730, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 13:31:37,902 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 279 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:37,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 171 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22075 states. [2022-02-16 13:31:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22075 to 20929. [2022-02-16 13:31:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20929 states, 20928 states have (on average 2.879539373088685) internal successors, (60263), 20928 states have internal predecessors, (60263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20929 states to 20929 states and 60263 transitions. [2022-02-16 13:31:38,325 INFO L78 Accepts]: Start accepts. Automaton has 20929 states and 60263 transitions. Word has length 25 [2022-02-16 13:31:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:38,326 INFO L470 AbstractCegarLoop]: Abstraction has 20929 states and 60263 transitions. [2022-02-16 13:31:38,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 20929 states and 60263 transitions. [2022-02-16 13:31:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:38,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:38,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:38,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-16 13:31:38,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-16 13:31:38,565 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash 812567972, now seen corresponding path program 12 times [2022-02-16 13:31:38,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:38,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920195522] [2022-02-16 13:31:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:38,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:38,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:38,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920195522] [2022-02-16 13:31:38,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920195522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:38,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682187417] [2022-02-16 13:31:38,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:31:38,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:38,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:38,618 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) [2022-02-16 13:31:38,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-16 13:31:38,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:31:38,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:38,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:38,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:38,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:38,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682187417] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:38,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:38,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-02-16 13:31:38,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200862264] [2022-02-16 13:31:38,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:38,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:38,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:38,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:38,897 INFO L87 Difference]: Start difference. First operand 20929 states and 60263 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:39,748 INFO L93 Difference]: Finished difference Result 22122 states and 62240 transitions. [2022-02-16 13:31:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 13:31:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:39,798 INFO L225 Difference]: With dead ends: 22122 [2022-02-16 13:31:39,798 INFO L226 Difference]: Without dead ends: 22108 [2022-02-16 13:31:39,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=660, Invalid=2420, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 13:31:39,799 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 291 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:39,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 217 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:31:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22108 states. [2022-02-16 13:31:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22108 to 20924. [2022-02-16 13:31:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20924 states, 20923 states have (on average 2.8783635233953064) internal successors, (60224), 20923 states have internal predecessors, (60224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20924 states to 20924 states and 60224 transitions. [2022-02-16 13:31:40,240 INFO L78 Accepts]: Start accepts. Automaton has 20924 states and 60224 transitions. Word has length 25 [2022-02-16 13:31:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:40,240 INFO L470 AbstractCegarLoop]: Abstraction has 20924 states and 60224 transitions. [2022-02-16 13:31:40,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 20924 states and 60224 transitions. [2022-02-16 13:31:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:40,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:40,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:40,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-16 13:31:40,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:40,475 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash 259338492, now seen corresponding path program 13 times [2022-02-16 13:31:40,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:40,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503395875] [2022-02-16 13:31:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:40,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:40,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:40,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503395875] [2022-02-16 13:31:40,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503395875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:40,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67719924] [2022-02-16 13:31:40,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:31:40,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:40,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:40,548 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) [2022-02-16 13:31:40,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-16 13:31:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:40,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:31:40,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:40,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:40,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67719924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:40,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:40,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-16 13:31:40,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558527802] [2022-02-16 13:31:40,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:40,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:31:40,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:31:40,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:31:40,819 INFO L87 Difference]: Start difference. First operand 20924 states and 60224 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:41,688 INFO L93 Difference]: Finished difference Result 29209 states and 79800 transitions. [2022-02-16 13:31:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 13:31:41,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:41,755 INFO L225 Difference]: With dead ends: 29209 [2022-02-16 13:31:41,755 INFO L226 Difference]: Without dead ends: 29180 [2022-02-16 13:31:41,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=523, Invalid=1927, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 13:31:41,756 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 195 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:41,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 146 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29180 states. [2022-02-16 13:31:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29180 to 21953. [2022-02-16 13:31:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21953 states, 21952 states have (on average 2.871765670553936) internal successors, (63041), 21952 states have internal predecessors, (63041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21953 states to 21953 states and 63041 transitions. [2022-02-16 13:31:42,227 INFO L78 Accepts]: Start accepts. Automaton has 21953 states and 63041 transitions. Word has length 25 [2022-02-16 13:31:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:42,227 INFO L470 AbstractCegarLoop]: Abstraction has 21953 states and 63041 transitions. [2022-02-16 13:31:42,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 21953 states and 63041 transitions. [2022-02-16 13:31:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:42,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:42,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:42,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-16 13:31:42,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:42,462 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:42,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1135526820, now seen corresponding path program 14 times [2022-02-16 13:31:42,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:42,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253962778] [2022-02-16 13:31:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:42,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:42,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:42,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253962778] [2022-02-16 13:31:42,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253962778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:42,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114927626] [2022-02-16 13:31:42,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:31:42,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:42,518 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) [2022-02-16 13:31:42,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-16 13:31:42,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:31:42,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:42,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:42,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:42,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:42,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114927626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:42,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:42,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:31:42,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169344533] [2022-02-16 13:31:42,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:42,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:31:42,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:31:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:31:42,859 INFO L87 Difference]: Start difference. First operand 21953 states and 63041 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:43,915 INFO L93 Difference]: Finished difference Result 23856 states and 66474 transitions. [2022-02-16 13:31:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 13:31:43,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:43,978 INFO L225 Difference]: With dead ends: 23856 [2022-02-16 13:31:43,978 INFO L226 Difference]: Without dead ends: 23840 [2022-02-16 13:31:43,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=872, Invalid=3418, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 13:31:43,979 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 299 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:43,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 269 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:31:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23840 states. [2022-02-16 13:31:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23840 to 22609. [2022-02-16 13:31:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22609 states, 22608 states have (on average 2.852972399150743) internal successors, (64500), 22608 states have internal predecessors, (64500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22609 states to 22609 states and 64500 transitions. [2022-02-16 13:31:44,473 INFO L78 Accepts]: Start accepts. Automaton has 22609 states and 64500 transitions. Word has length 25 [2022-02-16 13:31:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:44,473 INFO L470 AbstractCegarLoop]: Abstraction has 22609 states and 64500 transitions. [2022-02-16 13:31:44,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 22609 states and 64500 transitions. [2022-02-16 13:31:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:44,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:44,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:44,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-16 13:31:44,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-16 13:31:44,711 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash -757486040, now seen corresponding path program 15 times [2022-02-16 13:31:44,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:44,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658389411] [2022-02-16 13:31:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:44,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:44,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:44,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658389411] [2022-02-16 13:31:44,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658389411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:44,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773304593] [2022-02-16 13:31:44,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:31:44,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:44,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:44,771 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) [2022-02-16 13:31:44,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-16 13:31:44,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:31:44,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:44,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:31:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:45,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:45,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773304593] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:45,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:45,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-16 13:31:45,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83359266] [2022-02-16 13:31:45,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:45,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:31:45,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:31:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:31:45,063 INFO L87 Difference]: Start difference. First operand 22609 states and 64500 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-02-16 13:31:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:46,620 INFO L93 Difference]: Finished difference Result 27151 states and 74834 transitions. [2022-02-16 13:31:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-16 13:31:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 25 [2022-02-16 13:31:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:46,704 INFO L225 Difference]: With dead ends: 27151 [2022-02-16 13:31:46,704 INFO L226 Difference]: Without dead ends: 27151 [2022-02-16 13:31:46,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1734, Invalid=5406, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 13:31:46,706 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 286 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:46,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 189 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27151 states. [2022-02-16 13:31:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27151 to 22712. [2022-02-16 13:31:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22712 states, 22711 states have (on average 2.849147989960812) internal successors, (64707), 22711 states have internal predecessors, (64707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22712 states to 22712 states and 64707 transitions. [2022-02-16 13:31:47,230 INFO L78 Accepts]: Start accepts. Automaton has 22712 states and 64707 transitions. Word has length 25 [2022-02-16 13:31:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:47,230 INFO L470 AbstractCegarLoop]: Abstraction has 22712 states and 64707 transitions. [2022-02-16 13:31:47,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-02-16 13:31:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand 22712 states and 64707 transitions. [2022-02-16 13:31:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:47,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:47,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:47,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-16 13:31:47,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-16 13:31:47,469 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1032119128, now seen corresponding path program 16 times [2022-02-16 13:31:47,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:47,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239883822] [2022-02-16 13:31:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:47,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:47,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:47,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239883822] [2022-02-16 13:31:47,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239883822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:47,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726164466] [2022-02-16 13:31:47,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:31:47,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:47,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:47,521 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) [2022-02-16 13:31:47,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-16 13:31:47,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:31:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:31:47,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:47,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:47,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726164466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:47,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:47,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-16 13:31:47,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240836581] [2022-02-16 13:31:47,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:47,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:31:47,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:31:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:31:47,815 INFO L87 Difference]: Start difference. First operand 22712 states and 64707 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 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) [2022-02-16 13:31:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:49,116 INFO L93 Difference]: Finished difference Result 29606 states and 80783 transitions. [2022-02-16 13:31:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-16 13:31:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 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 25 [2022-02-16 13:31:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:49,185 INFO L225 Difference]: With dead ends: 29606 [2022-02-16 13:31:49,185 INFO L226 Difference]: Without dead ends: 29598 [2022-02-16 13:31:49,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1041, Invalid=3789, Unknown=0, NotChecked=0, Total=4830 [2022-02-16 13:31:49,186 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:49,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 222 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29598 states. [2022-02-16 13:31:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29598 to 22106. [2022-02-16 13:31:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22106 states, 22105 states have (on average 2.8382718841890977) internal successors, (62740), 22105 states have internal predecessors, (62740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22106 states to 22106 states and 62740 transitions. [2022-02-16 13:31:49,724 INFO L78 Accepts]: Start accepts. Automaton has 22106 states and 62740 transitions. Word has length 25 [2022-02-16 13:31:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:49,724 INFO L470 AbstractCegarLoop]: Abstraction has 22106 states and 62740 transitions. [2022-02-16 13:31:49,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 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) [2022-02-16 13:31:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 22106 states and 62740 transitions. [2022-02-16 13:31:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:49,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:49,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:49,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-16 13:31:49,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:49,957 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:49,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1817247636, now seen corresponding path program 36 times [2022-02-16 13:31:49,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:49,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060710418] [2022-02-16 13:31:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:49,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:50,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:50,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060710418] [2022-02-16 13:31:50,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060710418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:50,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178548931] [2022-02-16 13:31:50,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:31:50,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:50,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:50,003 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) [2022-02-16 13:31:50,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-16 13:31:50,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:31:50,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:50,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:31:50,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:50,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:50,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178548931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:50,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:50,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-02-16 13:31:50,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254827602] [2022-02-16 13:31:50,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:50,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:31:50,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:31:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:31:50,141 INFO L87 Difference]: Start difference. First operand 22106 states and 62740 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:50,443 INFO L93 Difference]: Finished difference Result 28815 states and 76158 transitions. [2022-02-16 13:31:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:31:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:50,525 INFO L225 Difference]: With dead ends: 28815 [2022-02-16 13:31:50,525 INFO L226 Difference]: Without dead ends: 28810 [2022-02-16 13:31:50,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:31:50,525 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 261 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:50,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 65 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:31:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28810 states. [2022-02-16 13:31:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28810 to 21218. [2022-02-16 13:31:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21218 states, 21217 states have (on average 2.8274968185888674) internal successors, (59991), 21217 states have internal predecessors, (59991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21218 states to 21218 states and 59991 transitions. [2022-02-16 13:31:51,050 INFO L78 Accepts]: Start accepts. Automaton has 21218 states and 59991 transitions. Word has length 25 [2022-02-16 13:31:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:51,050 INFO L470 AbstractCegarLoop]: Abstraction has 21218 states and 59991 transitions. [2022-02-16 13:31:51,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 21218 states and 59991 transitions. [2022-02-16 13:31:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:51,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:51,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:51,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-16 13:31:51,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-02-16 13:31:51,288 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash 349357300, now seen corresponding path program 17 times [2022-02-16 13:31:51,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:51,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004846290] [2022-02-16 13:31:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:51,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:51,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:51,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004846290] [2022-02-16 13:31:51,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004846290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:51,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668350190] [2022-02-16 13:31:51,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:31:51,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:51,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:51,339 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) [2022-02-16 13:31:51,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-16 13:31:51,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:31:51,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:51,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:31:51,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:51,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:51,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668350190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:51,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:51,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-16 13:31:51,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958833381] [2022-02-16 13:31:51,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:51,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:31:51,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:31:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:31:51,696 INFO L87 Difference]: Start difference. First operand 21218 states and 59991 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:53,676 INFO L93 Difference]: Finished difference Result 36098 states and 95296 transitions. [2022-02-16 13:31:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-16 13:31:53,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:53,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:53,775 INFO L225 Difference]: With dead ends: 36098 [2022-02-16 13:31:53,776 INFO L226 Difference]: Without dead ends: 36078 [2022-02-16 13:31:53,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1491, Invalid=4829, Unknown=0, NotChecked=0, Total=6320 [2022-02-16 13:31:53,777 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:53,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 323 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:31:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36078 states. [2022-02-16 13:31:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36078 to 21486. [2022-02-16 13:31:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21486 states, 21485 states have (on average 2.8285315336281127) internal successors, (60771), 21485 states have internal predecessors, (60771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21486 states to 21486 states and 60771 transitions. [2022-02-16 13:31:54,370 INFO L78 Accepts]: Start accepts. Automaton has 21486 states and 60771 transitions. Word has length 25 [2022-02-16 13:31:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:54,370 INFO L470 AbstractCegarLoop]: Abstraction has 21486 states and 60771 transitions. [2022-02-16 13:31:54,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 21486 states and 60771 transitions. [2022-02-16 13:31:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:54,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:54,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:54,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-16 13:31:54,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:54,605 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:54,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1030746826, now seen corresponding path program 18 times [2022-02-16 13:31:54,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:54,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369390028] [2022-02-16 13:31:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:54,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:54,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:54,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369390028] [2022-02-16 13:31:54,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369390028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:54,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472006443] [2022-02-16 13:31:54,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:31:54,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:54,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:54,654 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) [2022-02-16 13:31:54,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-16 13:31:54,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:31:54,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:31:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:31:54,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:54,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:54,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472006443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:54,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:54,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-16 13:31:54,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655605634] [2022-02-16 13:31:54,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:54,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:31:54,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:31:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:31:54,879 INFO L87 Difference]: Start difference. First operand 21486 states and 60771 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:56,400 INFO L93 Difference]: Finished difference Result 37103 states and 99610 transitions. [2022-02-16 13:31:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-16 13:31:56,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:56,501 INFO L225 Difference]: With dead ends: 37103 [2022-02-16 13:31:56,501 INFO L226 Difference]: Without dead ends: 37079 [2022-02-16 13:31:56,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1202, Invalid=4348, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 13:31:56,502 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 320 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:56,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 234 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:31:56,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37079 states. [2022-02-16 13:31:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37079 to 23707. [2022-02-16 13:31:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23707 states, 23706 states have (on average 2.8433729857420063) internal successors, (67405), 23706 states have internal predecessors, (67405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23707 states to 23707 states and 67405 transitions. [2022-02-16 13:31:57,088 INFO L78 Accepts]: Start accepts. Automaton has 23707 states and 67405 transitions. Word has length 25 [2022-02-16 13:31:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:31:57,088 INFO L470 AbstractCegarLoop]: Abstraction has 23707 states and 67405 transitions. [2022-02-16 13:31:57,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23707 states and 67405 transitions. [2022-02-16 13:31:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:31:57,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:31:57,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:31:57,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-16 13:31:57,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:57,328 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:31:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:31:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1891424268, now seen corresponding path program 19 times [2022-02-16 13:31:57,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:31:57,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708792460] [2022-02-16 13:31:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:31:57,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:31:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:57,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:31:57,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708792460] [2022-02-16 13:31:57,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708792460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:31:57,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482104739] [2022-02-16 13:31:57,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:31:57,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:31:57,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:31:57,369 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) [2022-02-16 13:31:57,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-16 13:31:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:31:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:31:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:31:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:57,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:31:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:31:57,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482104739] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:31:57,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:31:57,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-16 13:31:57,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929977385] [2022-02-16 13:31:57,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:31:57,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:31:57,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:31:57,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:31:57,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:31:57,610 INFO L87 Difference]: Start difference. First operand 23707 states and 67405 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:31:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:31:59,423 INFO L93 Difference]: Finished difference Result 39839 states and 105664 transitions. [2022-02-16 13:31:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-16 13:31:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:31:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:31:59,525 INFO L225 Difference]: With dead ends: 39839 [2022-02-16 13:31:59,525 INFO L226 Difference]: Without dead ends: 39839 [2022-02-16 13:31:59,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2342 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1560, Invalid=4920, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 13:31:59,526 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 310 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:31:59,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 339 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:31:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39839 states. [2022-02-16 13:32:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39839 to 23666. [2022-02-16 13:32:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23666 states, 23665 states have (on average 2.844960912740334) internal successors, (67326), 23665 states have internal predecessors, (67326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23666 states to 23666 states and 67326 transitions. [2022-02-16 13:32:00,164 INFO L78 Accepts]: Start accepts. Automaton has 23666 states and 67326 transitions. Word has length 25 [2022-02-16 13:32:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:00,164 INFO L470 AbstractCegarLoop]: Abstraction has 23666 states and 67326 transitions. [2022-02-16 13:32:00,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 23666 states and 67326 transitions. [2022-02-16 13:32:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:00,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:00,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:00,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-16 13:32:00,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-02-16 13:32:00,401 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash -55530320, now seen corresponding path program 20 times [2022-02-16 13:32:00,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:00,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252806368] [2022-02-16 13:32:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:00,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:00,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:00,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252806368] [2022-02-16 13:32:00,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252806368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:00,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849222857] [2022-02-16 13:32:00,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:00,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:00,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:00,450 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) [2022-02-16 13:32:00,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-16 13:32:00,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:00,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:00,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:32:00,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:00,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:00,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849222857] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:00,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:00,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-16 13:32:00,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149906618] [2022-02-16 13:32:00,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:00,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:32:00,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:32:00,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:00,708 INFO L87 Difference]: Start difference. First operand 23666 states and 67326 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:01,627 INFO L93 Difference]: Finished difference Result 25667 states and 70989 transitions. [2022-02-16 13:32:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-16 13:32:01,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:32:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:01,690 INFO L225 Difference]: With dead ends: 25667 [2022-02-16 13:32:01,691 INFO L226 Difference]: Without dead ends: 25663 [2022-02-16 13:32:01,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 13:32:01,691 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 307 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:01,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 186 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:32:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25663 states. [2022-02-16 13:32:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25663 to 23670. [2022-02-16 13:32:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23670 states, 23669 states have (on average 2.8444801216781443) internal successors, (67326), 23669 states have internal predecessors, (67326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23670 states to 23670 states and 67326 transitions. [2022-02-16 13:32:02,172 INFO L78 Accepts]: Start accepts. Automaton has 23670 states and 67326 transitions. Word has length 25 [2022-02-16 13:32:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:02,172 INFO L470 AbstractCegarLoop]: Abstraction has 23670 states and 67326 transitions. [2022-02-16 13:32:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 23670 states and 67326 transitions. [2022-02-16 13:32:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:02,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:02,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:02,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-16 13:32:02,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:02,409 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1049064372, now seen corresponding path program 21 times [2022-02-16 13:32:02,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:02,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066066889] [2022-02-16 13:32:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:02,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:02,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:02,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066066889] [2022-02-16 13:32:02,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066066889] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:02,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518981144] [2022-02-16 13:32:02,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:02,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:02,455 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:02,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-16 13:32:02,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:32:02,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:02,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:32:02,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:02,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:02,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518981144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:02,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:02,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-16 13:32:02,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89300147] [2022-02-16 13:32:02,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:02,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:32:02,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:02,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:32:02,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:02,695 INFO L87 Difference]: Start difference. First operand 23670 states and 67326 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:04,011 INFO L93 Difference]: Finished difference Result 25764 states and 71163 transitions. [2022-02-16 13:32:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 13:32:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:32:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:04,085 INFO L225 Difference]: With dead ends: 25764 [2022-02-16 13:32:04,085 INFO L226 Difference]: Without dead ends: 25764 [2022-02-16 13:32:04,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1062, Invalid=3360, Unknown=0, NotChecked=0, Total=4422 [2022-02-16 13:32:04,086 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 270 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:04,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 304 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:32:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25764 states. [2022-02-16 13:32:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25764 to 23614. [2022-02-16 13:32:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23614 states, 23613 states have (on average 2.8434760513276585) internal successors, (67143), 23613 states have internal predecessors, (67143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23614 states to 23614 states and 67143 transitions. [2022-02-16 13:32:04,603 INFO L78 Accepts]: Start accepts. Automaton has 23614 states and 67143 transitions. Word has length 25 [2022-02-16 13:32:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:04,603 INFO L470 AbstractCegarLoop]: Abstraction has 23614 states and 67143 transitions. [2022-02-16 13:32:04,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23614 states and 67143 transitions. [2022-02-16 13:32:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:04,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:04,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:04,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:04,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:04,871 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1507697848, now seen corresponding path program 22 times [2022-02-16 13:32:04,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:04,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166077346] [2022-02-16 13:32:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:04,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:04,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:04,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166077346] [2022-02-16 13:32:04,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166077346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:04,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66918178] [2022-02-16 13:32:04,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:04,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:04,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:04,916 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:04,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-16 13:32:04,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:04,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:32:04,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:05,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:05,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66918178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:05,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:05,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 13:32:05,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651517312] [2022-02-16 13:32:05,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:05,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:32:05,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:32:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:05,173 INFO L87 Difference]: Start difference. First operand 23614 states and 67143 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:06,153 INFO L93 Difference]: Finished difference Result 39261 states and 105962 transitions. [2022-02-16 13:32:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 13:32:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:32:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:06,273 INFO L225 Difference]: With dead ends: 39261 [2022-02-16 13:32:06,273 INFO L226 Difference]: Without dead ends: 39236 [2022-02-16 13:32:06,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=568, Invalid=1982, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 13:32:06,274 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 208 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:06,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 261 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:32:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39236 states. [2022-02-16 13:32:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39236 to 25127. [2022-02-16 13:32:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25127 states, 25126 states have (on average 2.8534983682241504) internal successors, (71697), 25126 states have internal predecessors, (71697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25127 states to 25127 states and 71697 transitions. [2022-02-16 13:32:06,961 INFO L78 Accepts]: Start accepts. Automaton has 25127 states and 71697 transitions. Word has length 25 [2022-02-16 13:32:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:06,962 INFO L470 AbstractCegarLoop]: Abstraction has 25127 states and 71697 transitions. [2022-02-16 13:32:06,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 25127 states and 71697 transitions. [2022-02-16 13:32:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:07,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:07,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:07,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:07,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:07,209 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:07,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash -328627356, now seen corresponding path program 37 times [2022-02-16 13:32:07,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:07,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62821683] [2022-02-16 13:32:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:07,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:07,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:07,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62821683] [2022-02-16 13:32:07,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62821683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:07,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026547691] [2022-02-16 13:32:07,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:32:07,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:07,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:07,253 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:07,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-16 13:32:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:07,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:32:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:07,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:07,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026547691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:07,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:07,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-02-16 13:32:07,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677983300] [2022-02-16 13:32:07,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:07,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 13:32:07,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:07,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 13:32:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:32:07,438 INFO L87 Difference]: Start difference. First operand 25127 states and 71697 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:07,853 INFO L93 Difference]: Finished difference Result 37535 states and 98273 transitions. [2022-02-16 13:32:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:32:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:32:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:07,971 INFO L225 Difference]: With dead ends: 37535 [2022-02-16 13:32:07,972 INFO L226 Difference]: Without dead ends: 37535 [2022-02-16 13:32:07,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:32:07,972 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 256 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:07,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 92 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37535 states. [2022-02-16 13:32:08,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37535 to 25164. [2022-02-16 13:32:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25164 states, 25163 states have (on average 2.8522036323172912) internal successors, (71770), 25163 states have internal predecessors, (71770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25164 states to 25164 states and 71770 transitions. [2022-02-16 13:32:08,757 INFO L78 Accepts]: Start accepts. Automaton has 25164 states and 71770 transitions. Word has length 25 [2022-02-16 13:32:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:08,757 INFO L470 AbstractCegarLoop]: Abstraction has 25164 states and 71770 transitions. [2022-02-16 13:32:08,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 25164 states and 71770 transitions. [2022-02-16 13:32:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:08,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:08,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:08,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-16 13:32:08,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-16 13:32:09,000 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash 180404964, now seen corresponding path program 38 times [2022-02-16 13:32:09,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:09,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838083745] [2022-02-16 13:32:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:09,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:09,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:09,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838083745] [2022-02-16 13:32:09,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838083745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:09,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697171448] [2022-02-16 13:32:09,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:09,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:09,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:09,052 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:09,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-16 13:32:09,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:09,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:09,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:32:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:09,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:09,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697171448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:09,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:09,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-16 13:32:09,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637779083] [2022-02-16 13:32:09,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:09,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:32:09,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:09,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:32:09,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:32:09,301 INFO L87 Difference]: Start difference. First operand 25164 states and 71770 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-02-16 13:32:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:11,234 INFO L93 Difference]: Finished difference Result 28552 states and 78343 transitions. [2022-02-16 13:32:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-16 13:32:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 25 [2022-02-16 13:32:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:11,307 INFO L225 Difference]: With dead ends: 28552 [2022-02-16 13:32:11,308 INFO L226 Difference]: Without dead ends: 28551 [2022-02-16 13:32:11,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3687 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2246, Invalid=8056, Unknown=0, NotChecked=0, Total=10302 [2022-02-16 13:32:11,309 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 373 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:11,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 253 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:32:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28551 states. [2022-02-16 13:32:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28551 to 25187. [2022-02-16 13:32:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25187 states, 25186 states have (on average 2.8506313031048998) internal successors, (71796), 25186 states have internal predecessors, (71796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25187 states to 25187 states and 71796 transitions. [2022-02-16 13:32:11,950 INFO L78 Accepts]: Start accepts. Automaton has 25187 states and 71796 transitions. Word has length 25 [2022-02-16 13:32:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:11,950 INFO L470 AbstractCegarLoop]: Abstraction has 25187 states and 71796 transitions. [2022-02-16 13:32:11,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-02-16 13:32:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 25187 states and 71796 transitions. [2022-02-16 13:32:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:11,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:11,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:12,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:12,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:12,194 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:12,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:12,194 INFO L85 PathProgramCache]: Analyzing trace with hash 115868008, now seen corresponding path program 23 times [2022-02-16 13:32:12,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:12,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945421513] [2022-02-16 13:32:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:12,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:12,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:12,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945421513] [2022-02-16 13:32:12,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945421513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:12,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239660064] [2022-02-16 13:32:12,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:32:12,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:12,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:12,245 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:12,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-16 13:32:12,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:32:12,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:32:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:12,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:12,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239660064] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:12,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:12,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-16 13:32:12,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369712551] [2022-02-16 13:32:12,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:12,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:32:12,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:12,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:32:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:12,485 INFO L87 Difference]: Start difference. First operand 25187 states and 71796 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:14,360 INFO L93 Difference]: Finished difference Result 50260 states and 137646 transitions. [2022-02-16 13:32:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-16 13:32:14,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:32:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:14,700 INFO L225 Difference]: With dead ends: 50260 [2022-02-16 13:32:14,700 INFO L226 Difference]: Without dead ends: 50235 [2022-02-16 13:32:14,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3167 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1838, Invalid=6534, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 13:32:14,701 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 434 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:14,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 274 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:32:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50235 states. [2022-02-16 13:32:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50235 to 34665. [2022-02-16 13:32:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34665 states, 34664 states have (on average 2.9402550196168935) internal successors, (101921), 34664 states have internal predecessors, (101921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34665 states to 34665 states and 101921 transitions. [2022-02-16 13:32:15,722 INFO L78 Accepts]: Start accepts. Automaton has 34665 states and 101921 transitions. Word has length 25 [2022-02-16 13:32:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:15,722 INFO L470 AbstractCegarLoop]: Abstraction has 34665 states and 101921 transitions. [2022-02-16 13:32:15,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 34665 states and 101921 transitions. [2022-02-16 13:32:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:15,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:15,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:15,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-16 13:32:15,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:15,984 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1162750392, now seen corresponding path program 24 times [2022-02-16 13:32:15,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:15,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338091837] [2022-02-16 13:32:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:15,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:16,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:16,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338091837] [2022-02-16 13:32:16,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338091837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:16,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576013115] [2022-02-16 13:32:16,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:32:16,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:16,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:16,046 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:16,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-16 13:32:16,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:32:16,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:16,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:32:16,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:16,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:16,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576013115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:16,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:16,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-16 13:32:16,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381350082] [2022-02-16 13:32:16,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:16,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:32:16,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:32:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:16,294 INFO L87 Difference]: Start difference. First operand 34665 states and 101921 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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) [2022-02-16 13:32:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:18,230 INFO L93 Difference]: Finished difference Result 61998 states and 169138 transitions. [2022-02-16 13:32:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-16 13:32:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 25 [2022-02-16 13:32:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:18,490 INFO L225 Difference]: With dead ends: 61998 [2022-02-16 13:32:18,490 INFO L226 Difference]: Without dead ends: 61994 [2022-02-16 13:32:18,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1162, Invalid=3668, Unknown=0, NotChecked=0, Total=4830 [2022-02-16 13:32:18,490 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 332 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:18,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 265 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:32:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61994 states. [2022-02-16 13:32:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61994 to 38573. [2022-02-16 13:32:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38573 states, 38572 states have (on average 2.9638597946697085) internal successors, (114322), 38572 states have internal predecessors, (114322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38573 states to 38573 states and 114322 transitions. [2022-02-16 13:32:19,932 INFO L78 Accepts]: Start accepts. Automaton has 38573 states and 114322 transitions. Word has length 25 [2022-02-16 13:32:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:19,932 INFO L470 AbstractCegarLoop]: Abstraction has 38573 states and 114322 transitions. [2022-02-16 13:32:19,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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) [2022-02-16 13:32:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 38573 states and 114322 transitions. [2022-02-16 13:32:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:20,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:20,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:20,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:20,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2022-02-16 13:32:20,211 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 756415780, now seen corresponding path program 39 times [2022-02-16 13:32:20,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:20,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96223862] [2022-02-16 13:32:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:20,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:20,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:20,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96223862] [2022-02-16 13:32:20,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96223862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:20,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100711679] [2022-02-16 13:32:20,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:20,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:20,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:20,273 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:20,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-16 13:32:20,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:32:20,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:32:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:20,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:20,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100711679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:20,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:20,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-16 13:32:20,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82928745] [2022-02-16 13:32:20,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:20,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:32:20,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:20,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:32:20,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:32:20,538 INFO L87 Difference]: Start difference. First operand 38573 states and 114322 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:21,909 INFO L93 Difference]: Finished difference Result 40621 states and 117814 transitions. [2022-02-16 13:32:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 13:32:21,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:32:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:22,030 INFO L225 Difference]: With dead ends: 40621 [2022-02-16 13:32:22,030 INFO L226 Difference]: Without dead ends: 40613 [2022-02-16 13:32:22,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 13:32:22,030 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 255 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:22,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 298 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:32:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40613 states. [2022-02-16 13:32:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40613 to 38573. [2022-02-16 13:32:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38573 states, 38572 states have (on average 2.962433889868298) internal successors, (114267), 38572 states have internal predecessors, (114267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38573 states to 38573 states and 114267 transitions. [2022-02-16 13:32:23,022 INFO L78 Accepts]: Start accepts. Automaton has 38573 states and 114267 transitions. Word has length 25 [2022-02-16 13:32:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:23,022 INFO L470 AbstractCegarLoop]: Abstraction has 38573 states and 114267 transitions. [2022-02-16 13:32:23,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 38573 states and 114267 transitions. [2022-02-16 13:32:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:23,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:23,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:23,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:23,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:23,515 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -330344216, now seen corresponding path program 25 times [2022-02-16 13:32:23,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:23,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442875436] [2022-02-16 13:32:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:23,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:23,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:23,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442875436] [2022-02-16 13:32:23,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442875436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:23,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094572868] [2022-02-16 13:32:23,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:32:23,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:23,568 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:23,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-16 13:32:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:23,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:32:23,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:23,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:23,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094572868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:23,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:23,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-16 13:32:23,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872453791] [2022-02-16 13:32:23,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:23,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:32:23,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:32:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:32:23,826 INFO L87 Difference]: Start difference. First operand 38573 states and 114267 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-02-16 13:32:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:24,997 INFO L93 Difference]: Finished difference Result 39694 states and 116197 transitions. [2022-02-16 13:32:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-16 13:32:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 25 [2022-02-16 13:32:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:25,098 INFO L225 Difference]: With dead ends: 39694 [2022-02-16 13:32:25,098 INFO L226 Difference]: Without dead ends: 39692 [2022-02-16 13:32:25,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=791, Invalid=2749, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 13:32:25,099 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 226 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:25,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 217 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:32:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39692 states. [2022-02-16 13:32:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39692 to 38651. [2022-02-16 13:32:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38651 states, 38650 states have (on average 2.9620698576972835) internal successors, (114484), 38650 states have internal predecessors, (114484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38651 states to 38651 states and 114484 transitions. [2022-02-16 13:32:26,118 INFO L78 Accepts]: Start accepts. Automaton has 38651 states and 114484 transitions. Word has length 25 [2022-02-16 13:32:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:26,118 INFO L470 AbstractCegarLoop]: Abstraction has 38651 states and 114484 transitions. [2022-02-16 13:32:26,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-02-16 13:32:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 38651 states and 114484 transitions. [2022-02-16 13:32:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:26,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:26,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:26,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-16 13:32:26,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:26,383 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:26,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1287629172, now seen corresponding path program 26 times [2022-02-16 13:32:26,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:26,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119626664] [2022-02-16 13:32:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:26,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:26,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:26,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119626664] [2022-02-16 13:32:26,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119626664] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:26,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884475034] [2022-02-16 13:32:26,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:26,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:26,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:26,438 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:26,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-16 13:32:26,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:26,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:26,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:32:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:26,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:32:26,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884475034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:26,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:26,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-16 13:32:26,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119994178] [2022-02-16 13:32:26,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:26,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:26,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:26,695 INFO L87 Difference]: Start difference. First operand 38651 states and 114484 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2022-02-16 13:32:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:27,808 INFO L93 Difference]: Finished difference Result 39577 states and 116028 transitions. [2022-02-16 13:32:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 13:32:27,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 25 [2022-02-16 13:32:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:27,916 INFO L225 Difference]: With dead ends: 39577 [2022-02-16 13:32:27,916 INFO L226 Difference]: Without dead ends: 39569 [2022-02-16 13:32:27,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=549, Invalid=2207, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 13:32:27,917 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 222 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:27,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 238 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:32:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39569 states. [2022-02-16 13:32:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39569 to 38651. [2022-02-16 13:32:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38651 states, 38650 states have (on average 2.9619663648124193) internal successors, (114480), 38650 states have internal predecessors, (114480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38651 states to 38651 states and 114480 transitions. [2022-02-16 13:32:28,825 INFO L78 Accepts]: Start accepts. Automaton has 38651 states and 114480 transitions. Word has length 25 [2022-02-16 13:32:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:28,825 INFO L470 AbstractCegarLoop]: Abstraction has 38651 states and 114480 transitions. [2022-02-16 13:32:28,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2022-02-16 13:32:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 38651 states and 114480 transitions. [2022-02-16 13:32:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:29,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:29,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:29,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:29,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:29,263 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1463726744, now seen corresponding path program 27 times [2022-02-16 13:32:29,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:29,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698472838] [2022-02-16 13:32:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:29,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:29,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:29,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698472838] [2022-02-16 13:32:29,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698472838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:29,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847277502] [2022-02-16 13:32:29,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:29,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:29,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:29,328 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:29,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-16 13:32:29,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:32:29,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:29,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:32:29,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:29,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:29,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847277502] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:29,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:29,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-16 13:32:29,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837185439] [2022-02-16 13:32:29,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:29,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:32:29,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:32:29,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:32:29,603 INFO L87 Difference]: Start difference. First operand 38651 states and 114480 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-02-16 13:32:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:30,650 INFO L93 Difference]: Finished difference Result 39786 states and 116408 transitions. [2022-02-16 13:32:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-16 13:32:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 25 [2022-02-16 13:32:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:30,758 INFO L225 Difference]: With dead ends: 39786 [2022-02-16 13:32:30,758 INFO L226 Difference]: Without dead ends: 39776 [2022-02-16 13:32:30,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=636, Invalid=2670, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 13:32:30,759 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 252 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:30,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 370 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:32:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39776 states. [2022-02-16 13:32:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39776 to 38830. [2022-02-16 13:32:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38830 states, 38829 states have (on average 2.95817559040923) internal successors, (114863), 38829 states have internal predecessors, (114863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38830 states to 38830 states and 114863 transitions. [2022-02-16 13:32:31,823 INFO L78 Accepts]: Start accepts. Automaton has 38830 states and 114863 transitions. Word has length 25 [2022-02-16 13:32:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:31,823 INFO L470 AbstractCegarLoop]: Abstraction has 38830 states and 114863 transitions. [2022-02-16 13:32:31,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-02-16 13:32:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 38830 states and 114863 transitions. [2022-02-16 13:32:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 13:32:31,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:31,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:31,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-02-16 13:32:32,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-02-16 13:32:32,096 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:32:32,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1831054520, now seen corresponding path program 28 times [2022-02-16 13:32:32,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:32,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277655116] [2022-02-16 13:32:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:32,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:32,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:32,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277655116] [2022-02-16 13:32:32,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277655116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:32,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353087101] [2022-02-16 13:32:32,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:32,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:32,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:32,154 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:32,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-16 13:32:32,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:32,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 13:32:32,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:32,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:32,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353087101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:32,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:32,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-16 13:32:32,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933769709] [2022-02-16 13:32:32,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:32,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:32:32,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:32,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:32:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:32,412 INFO L87 Difference]: Start difference. First operand 38830 states and 114863 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:34,149 INFO L93 Difference]: Finished difference Result 65499 states and 181344 transitions. [2022-02-16 13:32:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 13:32:34,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 13:32:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:34,338 INFO L225 Difference]: With dead ends: 65499 [2022-02-16 13:32:34,339 INFO L226 Difference]: Without dead ends: 65495 [2022-02-16 13:32:34,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1127, Invalid=3565, Unknown=0, NotChecked=0, Total=4692 [2022-02-16 13:32:34,340 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 343 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:34,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 255 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 13:32:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65495 states.