/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:50:10,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:50:10,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:50:10,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:50:10,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 00:50:10,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:50:10,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:50:10,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:50:10,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:50:10,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:50:10,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:50:10,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:50:10,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:50:10,681 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:50:10,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:50:10,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:50:10,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:50:10,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:50:10,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:50:10,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:50:10,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:50:10,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:50:10,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:50:10,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:50:10,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:50:10,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:50:10,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:50:10,683 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:50:10,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:50:10,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:50:10,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:50:10,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:50:10,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:50:10,851 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:50:10,868 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:50:10,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2022-02-11 00:50:10,869 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2022-02-11 00:50:10,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:50:10,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:50:10,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:50:10,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:50:10,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:50:10,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,916 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:50:10,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:50:10,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:50:10,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:50:10,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:50:10,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:50:10,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:50:10,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:50:10,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:50:10,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/1) ... [2022-02-11 00:50:10,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:50:10,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:10,965 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) [2022-02-11 00:50:10,983 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 [2022-02-11 00:50:11,003 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:50:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:50:11,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:50:11,003 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:50:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:50:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:50:11,004 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:50:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:50:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:50:11,004 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 00:50:11,039 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:50:11,040 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:50:11,101 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:50:11,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:50:11,112 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 00:50:11,113 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:50:11 BoogieIcfgContainer [2022-02-11 00:50:11,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:50:11,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:50:11,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:50:11,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:50:11,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:50:10" (1/2) ... [2022-02-11 00:50:11,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9c2d9 and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:50:11, skipping insertion in model container [2022-02-11 00:50:11,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:50:11" (2/2) ... [2022-02-11 00:50:11,119 INFO L112 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2022-02-11 00:50:11,123 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:50:11,123 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:50:11,123 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:50:11,123 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:50:11,144 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-11 00:50:11,173 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:50:11,178 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, 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 [2022-02-11 00:50:11,178 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-11 00:50:11,185 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-02-11 00:50:11,197 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:50:11,203 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:11,204 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:11,204 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2028772855, now seen corresponding path program 1 times [2022-02-11 00:50:11,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:11,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121809475] [2022-02-11 00:50:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:11,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:11,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:11,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121809475] [2022-02-11 00:50:11,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121809475] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:50:11,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:50:11,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:50:11,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175765344] [2022-02-11 00:50:11,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:50:11,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 00:50:11,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:11,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 00:50:11,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:50:11,357 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:11,411 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2022-02-11 00:50:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 00:50:11,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:50:11,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:11,437 INFO L225 Difference]: With dead ends: 58 [2022-02-11 00:50:11,437 INFO L226 Difference]: Without dead ends: 43 [2022-02-11 00:50:11,438 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:50:11,443 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:11,444 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:50:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-11 00:50:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-02-11 00:50:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2022-02-11 00:50:11,473 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2022-02-11 00:50:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:11,474 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2022-02-11 00:50:11,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2022-02-11 00:50:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:50:11,475 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:11,475 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:11,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:50:11,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:11,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272181, now seen corresponding path program 1 times [2022-02-11 00:50:11,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:11,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981177666] [2022-02-11 00:50:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:11,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:11,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981177666] [2022-02-11 00:50:11,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981177666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:11,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178950574] [2022-02-11 00:50:11,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:11,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:11,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:11,592 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) [2022-02-11 00:50:11,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 00:50:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:50:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:11,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:11,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178950574] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:11,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-11 00:50:11,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-02-11 00:50:11,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165576123] [2022-02-11 00:50:11,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:50:11,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:50:11,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:50:11,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:50:11,890 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2022-02-11 00:50:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:11,999 INFO L93 Difference]: Finished difference Result 76 states and 127 transitions. [2022-02-11 00:50:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:50:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2022-02-11 00:50:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:12,006 INFO L225 Difference]: With dead ends: 76 [2022-02-11 00:50:12,006 INFO L226 Difference]: Without dead ends: 76 [2022-02-11 00:50:12,008 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:50:12,009 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:12,010 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:50:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-11 00:50:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2022-02-11 00:50:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2022-02-11 00:50:12,017 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2022-02-11 00:50:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:12,017 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2022-02-11 00:50:12,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2022-02-11 00:50:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2022-02-11 00:50:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:50:12,018 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:12,018 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:12,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-11 00:50:12,219 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 [2022-02-11 00:50:12,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash 987674481, now seen corresponding path program 2 times [2022-02-11 00:50:12,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:12,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169575224] [2022-02-11 00:50:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:12,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:12,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169575224] [2022-02-11 00:50:12,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169575224] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:50:12,268 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:50:12,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:50:12,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926057506] [2022-02-11 00:50:12,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:50:12,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:50:12,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:50:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:50:12,273 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2022-02-11 00:50:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:12,353 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2022-02-11 00:50:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:50:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2022-02-11 00:50:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:12,357 INFO L225 Difference]: With dead ends: 51 [2022-02-11 00:50:12,357 INFO L226 Difference]: Without dead ends: 49 [2022-02-11 00:50:12,358 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:50:12,360 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:12,362 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 27 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:50:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-11 00:50:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-02-11 00:50:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2022-02-11 00:50:12,376 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2022-02-11 00:50:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:12,376 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2022-02-11 00:50:12,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2022-02-11 00:50:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2022-02-11 00:50:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:50:12,377 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:12,378 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:12,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 00:50:12,378 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash 859553737, now seen corresponding path program 1 times [2022-02-11 00:50:12,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:12,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525074942] [2022-02-11 00:50:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:12,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:12,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:12,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525074942] [2022-02-11 00:50:12,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525074942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:12,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784942931] [2022-02-11 00:50:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:12,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:12,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:12,454 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) [2022-02-11 00:50:12,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 00:50:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:50:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:12,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:12,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784942931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:12,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:12,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-11 00:50:12,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734276366] [2022-02-11 00:50:12,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:12,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:50:12,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:50:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:50:12,655 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:12,680 INFO L93 Difference]: Finished difference Result 97 states and 174 transitions. [2022-02-11 00:50:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:50:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 00:50:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:12,681 INFO L225 Difference]: With dead ends: 97 [2022-02-11 00:50:12,681 INFO L226 Difference]: Without dead ends: 76 [2022-02-11 00:50:12,682 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:50:12,682 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:12,682 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 43 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:50:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-11 00:50:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2022-02-11 00:50:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.896551724137931) internal successors, (110), 58 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2022-02-11 00:50:12,686 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2022-02-11 00:50:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:12,686 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2022-02-11 00:50:12,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2022-02-11 00:50:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:50:12,687 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:12,687 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:12,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:12,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-11 00:50:12,903 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -611520693, now seen corresponding path program 2 times [2022-02-11 00:50:12,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:12,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981433186] [2022-02-11 00:50:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:12,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:12,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:12,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981433186] [2022-02-11 00:50:12,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981433186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:12,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118389793] [2022-02-11 00:50:12,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:12,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:12,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:12,972 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) [2022-02-11 00:50:12,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 00:50:12,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:12,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:12,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:50:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:13,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:13,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118389793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:13,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:13,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-11 00:50:13,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684993943] [2022-02-11 00:50:13,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:13,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:50:13,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:50:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:50:13,235 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-02-11 00:50:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:13,548 INFO L93 Difference]: Finished difference Result 184 states and 330 transitions. [2022-02-11 00:50:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:50:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 [2022-02-11 00:50:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:13,550 INFO L225 Difference]: With dead ends: 184 [2022-02-11 00:50:13,550 INFO L226 Difference]: Without dead ends: 178 [2022-02-11 00:50:13,551 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:50:13,551 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 186 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:13,552 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 94 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-11 00:50:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 68. [2022-02-11 00:50:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2022-02-11 00:50:13,571 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2022-02-11 00:50:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:13,571 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2022-02-11 00:50:13,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-02-11 00:50:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2022-02-11 00:50:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:50:13,572 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:13,572 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:13,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:13,772 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 [2022-02-11 00:50:13,773 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1341886603, now seen corresponding path program 3 times [2022-02-11 00:50:13,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:13,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559012374] [2022-02-11 00:50:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:13,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:13,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559012374] [2022-02-11 00:50:13,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559012374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:13,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575845561] [2022-02-11 00:50:13,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:13,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:13,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:13,829 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) [2022-02-11 00:50:13,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 00:50:13,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:50:13,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:50:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:13,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:14,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575845561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:14,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:14,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-11 00:50:14,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81702849] [2022-02-11 00:50:14,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:14,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:50:14,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:50:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:50:14,026 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2022-02-11 00:50:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:14,269 INFO L93 Difference]: Finished difference Result 146 states and 268 transitions. [2022-02-11 00:50:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:50:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 [2022-02-11 00:50:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:14,270 INFO L225 Difference]: With dead ends: 146 [2022-02-11 00:50:14,270 INFO L226 Difference]: Without dead ends: 142 [2022-02-11 00:50:14,271 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:14,272 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:14,272 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 54 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-11 00:50:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2022-02-11 00:50:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 66 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2022-02-11 00:50:14,278 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2022-02-11 00:50:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:14,278 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2022-02-11 00:50:14,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2022-02-11 00:50:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2022-02-11 00:50:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:50:14,279 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:14,279 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:14,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:14,479 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 [2022-02-11 00:50:14,480 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash -183772023, now seen corresponding path program 4 times [2022-02-11 00:50:14,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:14,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525459249] [2022-02-11 00:50:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:14,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:14,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:14,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525459249] [2022-02-11 00:50:14,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525459249] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:14,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511224835] [2022-02-11 00:50:14,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:14,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:14,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:14,532 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) [2022-02-11 00:50:14,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 00:50:14,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:14,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:14,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-11 00:50:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:14,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:14,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511224835] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:14,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:14,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-02-11 00:50:14,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073599080] [2022-02-11 00:50:14,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:14,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:50:14,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:50:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:50:14,706 INFO L87 Difference]: Start difference. First operand 67 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:14,735 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2022-02-11 00:50:14,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:50:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:50:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:14,738 INFO L225 Difference]: With dead ends: 163 [2022-02-11 00:50:14,739 INFO L226 Difference]: Without dead ends: 136 [2022-02-11 00:50:14,739 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:50:14,742 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:14,742 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:50:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-11 00:50:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2022-02-11 00:50:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2022-02-11 00:50:14,752 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2022-02-11 00:50:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:14,752 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2022-02-11 00:50:14,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2022-02-11 00:50:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:50:14,757 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:14,757 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:14,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:14,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:14,975 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1437238517, now seen corresponding path program 5 times [2022-02-11 00:50:14,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:14,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33438886] [2022-02-11 00:50:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:14,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:15,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:15,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33438886] [2022-02-11 00:50:15,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33438886] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:15,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074318340] [2022-02-11 00:50:15,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:15,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:15,054 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) [2022-02-11 00:50:15,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 00:50:15,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:50:15,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:15,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-11 00:50:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:15,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:15,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074318340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:15,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:15,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-11 00:50:15,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291548234] [2022-02-11 00:50:15,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:15,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:50:15,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:50:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:50:15,316 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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) [2022-02-11 00:50:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:15,859 INFO L93 Difference]: Finished difference Result 384 states and 727 transitions. [2022-02-11 00:50:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:50:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 25 [2022-02-11 00:50:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:15,861 INFO L225 Difference]: With dead ends: 384 [2022-02-11 00:50:15,861 INFO L226 Difference]: Without dead ends: 348 [2022-02-11 00:50:15,862 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:50:15,862 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 271 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:15,863 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 105 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-11 00:50:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 93. [2022-02-11 00:50:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2022-02-11 00:50:15,866 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2022-02-11 00:50:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:15,867 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2022-02-11 00:50:15,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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) [2022-02-11 00:50:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2022-02-11 00:50:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:50:15,867 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:15,867 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:15,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:16,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:16,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2140448121, now seen corresponding path program 6 times [2022-02-11 00:50:16,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:16,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426597885] [2022-02-11 00:50:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:16,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:16,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:16,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426597885] [2022-02-11 00:50:16,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426597885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:16,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694683795] [2022-02-11 00:50:16,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:16,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:16,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:16,140 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) [2022-02-11 00:50:16,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 00:50:16,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-11 00:50:16,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-11 00:50:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:16,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:16,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694683795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:16,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:16,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-02-11 00:50:16,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758016396] [2022-02-11 00:50:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:16,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:50:16,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:50:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:50:16,457 INFO L87 Difference]: Start difference. First operand 93 states and 180 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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) [2022-02-11 00:50:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:16,834 INFO L93 Difference]: Finished difference Result 240 states and 454 transitions. [2022-02-11 00:50:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:50:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 [2022-02-11 00:50:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:16,835 INFO L225 Difference]: With dead ends: 240 [2022-02-11 00:50:16,835 INFO L226 Difference]: Without dead ends: 236 [2022-02-11 00:50:16,836 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:50:16,836 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:16,837 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 57 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-11 00:50:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2022-02-11 00:50:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2022-02-11 00:50:16,840 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2022-02-11 00:50:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:16,840 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2022-02-11 00:50:16,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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) [2022-02-11 00:50:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2022-02-11 00:50:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:50:16,840 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:16,840 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:16,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:17,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:17,041 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:17,042 INFO L85 PathProgramCache]: Analyzing trace with hash 870348873, now seen corresponding path program 7 times [2022-02-11 00:50:17,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:17,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445081409] [2022-02-11 00:50:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:17,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:17,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445081409] [2022-02-11 00:50:17,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445081409] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:17,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319845462] [2022-02-11 00:50:17,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:17,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:17,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:17,116 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) [2022-02-11 00:50:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:17,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 00:50:17,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:50:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:17,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:17,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319845462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:17,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:17,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-02-11 00:50:17,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359044552] [2022-02-11 00:50:17,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:17,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:50:17,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:17,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:50:17,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:50:17,290 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:17,328 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2022-02-11 00:50:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:50:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:50:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:17,330 INFO L225 Difference]: With dead ends: 222 [2022-02-11 00:50:17,330 INFO L226 Difference]: Without dead ends: 189 [2022-02-11 00:50:17,330 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:50:17,331 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:17,332 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 133 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:50:17,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-11 00:50:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2022-02-11 00:50:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.075862068965517) internal successors, (301), 145 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2022-02-11 00:50:17,337 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2022-02-11 00:50:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:17,337 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2022-02-11 00:50:17,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2022-02-11 00:50:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:50:17,338 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:17,338 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:17,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:17,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-11 00:50:17,552 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -699202101, now seen corresponding path program 8 times [2022-02-11 00:50:17,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:17,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435525889] [2022-02-11 00:50:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:17,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:17,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435525889] [2022-02-11 00:50:17,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435525889] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:17,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810097082] [2022-02-11 00:50:17,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:17,653 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) [2022-02-11 00:50:17,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 00:50:17,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:17,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-11 00:50:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:17,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:18,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810097082] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:18,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:18,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-02-11 00:50:18,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396526508] [2022-02-11 00:50:18,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:18,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:50:18,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:50:18,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:50:18,030 INFO L87 Difference]: Start difference. First operand 146 states and 301 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:18,904 INFO L93 Difference]: Finished difference Result 614 states and 1173 transitions. [2022-02-11 00:50:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:50:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:50:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:18,906 INFO L225 Difference]: With dead ends: 614 [2022-02-11 00:50:18,906 INFO L226 Difference]: Without dead ends: 521 [2022-02-11 00:50:18,908 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:50:18,908 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 311 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:18,908 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 135 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:50:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-11 00:50:18,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 115. [2022-02-11 00:50:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9824561403508771) internal successors, (226), 114 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2022-02-11 00:50:18,913 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2022-02-11 00:50:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:18,913 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2022-02-11 00:50:18,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2022-02-11 00:50:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:50:18,913 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:18,913 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:18,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:19,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:19,119 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:19,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1726457475, now seen corresponding path program 9 times [2022-02-11 00:50:19,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:19,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230088018] [2022-02-11 00:50:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:19,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:19,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230088018] [2022-02-11 00:50:19,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230088018] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:19,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221496249] [2022-02-11 00:50:19,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:19,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:19,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:19,189 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) [2022-02-11 00:50:19,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 00:50:19,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-11 00:50:19,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-11 00:50:19,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:19,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:19,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221496249] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:19,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:19,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-02-11 00:50:19,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245258138] [2022-02-11 00:50:19,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:19,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:50:19,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:50:19,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:50:19,573 INFO L87 Difference]: Start difference. First operand 115 states and 226 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:20,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:20,182 INFO L93 Difference]: Finished difference Result 352 states and 678 transitions. [2022-02-11 00:50:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:50:20,183 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:50:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:20,184 INFO L225 Difference]: With dead ends: 352 [2022-02-11 00:50:20,184 INFO L226 Difference]: Without dead ends: 348 [2022-02-11 00:50:20,185 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:50:20,185 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 279 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:20,186 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 73 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-11 00:50:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2022-02-11 00:50:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2022-02-11 00:50:20,189 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2022-02-11 00:50:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:20,189 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2022-02-11 00:50:20,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:20,189 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2022-02-11 00:50:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 00:50:20,190 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:20,190 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:20,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:20,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-11 00:50:20,401 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1453740809, now seen corresponding path program 10 times [2022-02-11 00:50:20,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:20,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556821792] [2022-02-11 00:50:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:20,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:20,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556821792] [2022-02-11 00:50:20,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556821792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:20,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124149761] [2022-02-11 00:50:20,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:20,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:20,478 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) [2022-02-11 00:50:20,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 00:50:20,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:20,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:20,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:50:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:20,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:20,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124149761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:20,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:20,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-02-11 00:50:20,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253781444] [2022-02-11 00:50:20,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:20,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:50:20,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:20,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:50:20,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:50:20,687 INFO L87 Difference]: Start difference. First operand 103 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:20,749 INFO L93 Difference]: Finished difference Result 281 states and 544 transitions. [2022-02-11 00:50:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:50:20,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-11 00:50:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:20,751 INFO L225 Difference]: With dead ends: 281 [2022-02-11 00:50:20,751 INFO L226 Difference]: Without dead ends: 242 [2022-02-11 00:50:20,752 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:50:20,752 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 38 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:20,752 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 199 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-11 00:50:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2022-02-11 00:50:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.097297297297297) internal successors, (388), 185 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2022-02-11 00:50:20,756 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2022-02-11 00:50:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:20,756 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2022-02-11 00:50:20,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2022-02-11 00:50:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 00:50:20,757 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:20,757 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:20,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:20,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-11 00:50:20,971 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 976375691, now seen corresponding path program 11 times [2022-02-11 00:50:20,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:20,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285531509] [2022-02-11 00:50:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:20,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:21,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:21,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285531509] [2022-02-11 00:50:21,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285531509] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:21,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198018580] [2022-02-11 00:50:21,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:21,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:21,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:21,096 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) [2022-02-11 00:50:21,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 00:50:21,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 00:50:21,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:21,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:50:21,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:21,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:21,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198018580] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:21,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:21,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:50:21,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904540688] [2022-02-11 00:50:21,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:21,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:50:21,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:21,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:50:21,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:50:21,509 INFO L87 Difference]: Start difference. First operand 186 states and 388 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:22,782 INFO L93 Difference]: Finished difference Result 890 states and 1705 transitions. [2022-02-11 00:50:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:50:22,783 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 00:50:22,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:22,785 INFO L225 Difference]: With dead ends: 890 [2022-02-11 00:50:22,785 INFO L226 Difference]: Without dead ends: 725 [2022-02-11 00:50:22,786 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 00:50:22,787 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 397 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:22,787 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 150 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:50:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-02-11 00:50:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 137. [2022-02-11 00:50:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0) internal successors, (272), 136 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2022-02-11 00:50:22,792 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2022-02-11 00:50:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:22,792 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2022-02-11 00:50:22,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2022-02-11 00:50:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 00:50:22,793 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:22,793 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:22,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:23,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-11 00:50:23,009 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1583838335, now seen corresponding path program 12 times [2022-02-11 00:50:23,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:23,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154433914] [2022-02-11 00:50:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:23,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:23,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154433914] [2022-02-11 00:50:23,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154433914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:23,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379723083] [2022-02-11 00:50:23,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:23,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:23,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:23,100 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) [2022-02-11 00:50:23,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 00:50:23,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-11 00:50:23,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:23,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:50:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:23,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:23,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379723083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:23,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:23,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-02-11 00:50:23,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349621450] [2022-02-11 00:50:23,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:23,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:50:23,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:50:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:50:23,557 INFO L87 Difference]: Start difference. First operand 137 states and 272 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:24,457 INFO L93 Difference]: Finished difference Result 486 states and 946 transitions. [2022-02-11 00:50:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:50:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-11 00:50:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:24,459 INFO L225 Difference]: With dead ends: 486 [2022-02-11 00:50:24,459 INFO L226 Difference]: Without dead ends: 482 [2022-02-11 00:50:24,460 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:50:24,460 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 354 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:24,460 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 76 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-02-11 00:50:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2022-02-11 00:50:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2022-02-11 00:50:24,464 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2022-02-11 00:50:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:24,464 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2022-02-11 00:50:24,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2022-02-11 00:50:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:50:24,465 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:24,465 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:24,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:24,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-11 00:50:24,665 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:24,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1071262921, now seen corresponding path program 13 times [2022-02-11 00:50:24,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:24,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320355540] [2022-02-11 00:50:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:24,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:24,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:24,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320355540] [2022-02-11 00:50:24,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320355540] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:24,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405363521] [2022-02-11 00:50:24,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:24,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:24,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:24,735 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) [2022-02-11 00:50:24,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 00:50:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:50:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:24,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:24,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405363521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:24,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:24,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-02-11 00:50:24,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860098330] [2022-02-11 00:50:24,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:24,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 00:50:24,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:24,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 00:50:24,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:50:24,966 INFO L87 Difference]: Start difference. First operand 121 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:25,048 INFO L93 Difference]: Finished difference Result 340 states and 661 transitions. [2022-02-11 00:50:25,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:50:25,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:50:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:25,049 INFO L225 Difference]: With dead ends: 340 [2022-02-11 00:50:25,049 INFO L226 Difference]: Without dead ends: 295 [2022-02-11 00:50:25,050 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:50:25,050 INFO L934 BasicCegarLoop]: 48 mSDtfsCounter, 47 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:25,050 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 279 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-11 00:50:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2022-02-11 00:50:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.111111111111111) internal successors, (475), 225 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2022-02-11 00:50:25,054 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2022-02-11 00:50:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:25,054 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2022-02-11 00:50:25,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2022-02-11 00:50:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 00:50:25,055 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:25,055 INFO L515 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:25,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:25,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:25,271 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1278220363, now seen corresponding path program 14 times [2022-02-11 00:50:25,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:25,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603400481] [2022-02-11 00:50:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:25,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:25,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:25,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603400481] [2022-02-11 00:50:25,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603400481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:25,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855722698] [2022-02-11 00:50:25,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:25,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:25,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:25,397 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) [2022-02-11 00:50:25,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 00:50:25,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:25,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:50:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:25,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:25,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855722698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:25,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:25,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-02-11 00:50:25,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505765960] [2022-02-11 00:50:25,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:25,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:50:25,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:50:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:50:25,858 INFO L87 Difference]: Start difference. First operand 226 states and 475 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:27,657 INFO L93 Difference]: Finished difference Result 1206 states and 2313 transitions. [2022-02-11 00:50:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-11 00:50:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-11 00:50:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:27,661 INFO L225 Difference]: With dead ends: 1206 [2022-02-11 00:50:27,661 INFO L226 Difference]: Without dead ends: 957 [2022-02-11 00:50:27,663 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4401 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3470, Invalid=10572, Unknown=0, NotChecked=0, Total=14042 [2022-02-11 00:50:27,664 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 447 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:27,664 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 230 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:50:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-11 00:50:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 159. [2022-02-11 00:50:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0126582278481013) internal successors, (318), 158 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2022-02-11 00:50:27,672 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2022-02-11 00:50:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:27,672 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2022-02-11 00:50:27,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2022-02-11 00:50:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 00:50:27,672 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:27,672 INFO L515 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:27,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:27,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-11 00:50:27,880 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:27,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1281475707, now seen corresponding path program 15 times [2022-02-11 00:50:27,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:27,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229579139] [2022-02-11 00:50:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:27,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:27,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:27,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229579139] [2022-02-11 00:50:27,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229579139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:27,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161751227] [2022-02-11 00:50:27,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:27,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:27,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:27,967 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) [2022-02-11 00:50:27,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 00:50:27,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-02-11 00:50:27,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:50:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:28,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:28,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161751227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:28,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:28,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-02-11 00:50:28,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727609296] [2022-02-11 00:50:28,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:28,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:50:28,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:50:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:50:28,476 INFO L87 Difference]: Start difference. First operand 159 states and 318 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:29,671 INFO L93 Difference]: Finished difference Result 642 states and 1258 transitions. [2022-02-11 00:50:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:50:29,672 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-11 00:50:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:29,673 INFO L225 Difference]: With dead ends: 642 [2022-02-11 00:50:29,673 INFO L226 Difference]: Without dead ends: 638 [2022-02-11 00:50:29,675 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2553, Invalid=6759, Unknown=0, NotChecked=0, Total=9312 [2022-02-11 00:50:29,676 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 457 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:29,676 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 90 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:50:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-11 00:50:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2022-02-11 00:50:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2022-02-11 00:50:29,680 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2022-02-11 00:50:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:29,680 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2022-02-11 00:50:29,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:29,680 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2022-02-11 00:50:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:50:29,681 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:29,681 INFO L515 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:29,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:29,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-11 00:50:29,893 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:29,894 INFO L85 PathProgramCache]: Analyzing trace with hash -913783415, now seen corresponding path program 16 times [2022-02-11 00:50:29,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:29,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414032619] [2022-02-11 00:50:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:29,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:30,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:30,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414032619] [2022-02-11 00:50:30,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414032619] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:30,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112256543] [2022-02-11 00:50:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:30,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:30,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:30,007 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) [2022-02-11 00:50:30,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 00:50:30,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:30,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 00:50:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:30,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:30,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112256543] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:30,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:30,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-02-11 00:50:30,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799581440] [2022-02-11 00:50:30,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:30,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:50:30,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:50:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:50:30,286 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:30,386 INFO L93 Difference]: Finished difference Result 399 states and 778 transitions. [2022-02-11 00:50:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:50:30,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:50:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:30,387 INFO L225 Difference]: With dead ends: 399 [2022-02-11 00:50:30,387 INFO L226 Difference]: Without dead ends: 348 [2022-02-11 00:50:30,388 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:50:30,388 INFO L934 BasicCegarLoop]: 55 mSDtfsCounter, 56 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:30,388 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 373 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-11 00:50:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2022-02-11 00:50:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.120754716981132) internal successors, (562), 265 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2022-02-11 00:50:30,392 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2022-02-11 00:50:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:30,392 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2022-02-11 00:50:30,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2022-02-11 00:50:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-11 00:50:30,393 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:30,393 INFO L515 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:30,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:30,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:30,609 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1709629429, now seen corresponding path program 17 times [2022-02-11 00:50:30,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:30,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89850491] [2022-02-11 00:50:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:30,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:30,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:30,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89850491] [2022-02-11 00:50:30,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89850491] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:30,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964750166] [2022-02-11 00:50:30,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:30,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:30,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:30,777 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) [2022-02-11 00:50:30,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 00:50:30,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-11 00:50:30,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 00:50:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:31,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:31,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964750166] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:31,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:31,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-02-11 00:50:31,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993658363] [2022-02-11 00:50:31,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:31,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 00:50:31,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 00:50:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:50:31,329 INFO L87 Difference]: Start difference. First operand 266 states and 562 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:33,800 INFO L93 Difference]: Finished difference Result 1562 states and 2997 transitions. [2022-02-11 00:50:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-11 00:50:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-11 00:50:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:33,803 INFO L225 Difference]: With dead ends: 1562 [2022-02-11 00:50:33,803 INFO L226 Difference]: Without dead ends: 1217 [2022-02-11 00:50:33,804 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7192 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5330, Invalid=16426, Unknown=0, NotChecked=0, Total=21756 [2022-02-11 00:50:33,805 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 473 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:33,805 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 225 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:50:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-02-11 00:50:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 181. [2022-02-11 00:50:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.022222222222222) internal successors, (364), 180 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2022-02-11 00:50:33,811 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2022-02-11 00:50:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:33,811 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2022-02-11 00:50:33,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2022-02-11 00:50:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-11 00:50:33,812 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:33,812 INFO L515 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:33,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:34,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:34,028 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash 523397513, now seen corresponding path program 18 times [2022-02-11 00:50:34,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:34,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829120080] [2022-02-11 00:50:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:34,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:34,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829120080] [2022-02-11 00:50:34,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829120080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:34,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887035453] [2022-02-11 00:50:34,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:34,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:34,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:34,148 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) [2022-02-11 00:50:34,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 00:50:34,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-02-11 00:50:34,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:34,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 00:50:34,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:34,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:34,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887035453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:34,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:34,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-02-11 00:50:34,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918727053] [2022-02-11 00:50:34,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:34,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 00:50:34,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 00:50:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:50:34,743 INFO L87 Difference]: Start difference. First operand 181 states and 364 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:36,305 INFO L93 Difference]: Finished difference Result 820 states and 1614 transitions. [2022-02-11 00:50:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-11 00:50:36,305 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-11 00:50:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:36,308 INFO L225 Difference]: With dead ends: 820 [2022-02-11 00:50:36,308 INFO L226 Difference]: Without dead ends: 816 [2022-02-11 00:50:36,309 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3799, Invalid=10243, Unknown=0, NotChecked=0, Total=14042 [2022-02-11 00:50:36,310 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 410 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:36,310 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 108 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:50:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-02-11 00:50:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2022-02-11 00:50:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2022-02-11 00:50:36,315 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2022-02-11 00:50:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:36,315 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2022-02-11 00:50:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2022-02-11 00:50:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 00:50:36,319 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:36,319 INFO L515 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:36,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:36,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:36,536 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1095687497, now seen corresponding path program 19 times [2022-02-11 00:50:36,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:36,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033388212] [2022-02-11 00:50:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:36,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:36,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033388212] [2022-02-11 00:50:36,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033388212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:36,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572270308] [2022-02-11 00:50:36,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:36,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:36,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:36,637 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) [2022-02-11 00:50:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 00:50:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:36,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:36,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572270308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:36,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:36,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-02-11 00:50:36,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583767015] [2022-02-11 00:50:36,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:36,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:50:36,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:50:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:50:36,928 INFO L87 Difference]: Start difference. First operand 157 states and 317 transitions. Second operand has 10 states, 10 states have (on average 4.3) 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) [2022-02-11 00:50:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:37,055 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2022-02-11 00:50:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:50:37,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) 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 43 [2022-02-11 00:50:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:37,056 INFO L225 Difference]: With dead ends: 458 [2022-02-11 00:50:37,056 INFO L226 Difference]: Without dead ends: 401 [2022-02-11 00:50:37,056 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:50:37,057 INFO L934 BasicCegarLoop]: 62 mSDtfsCounter, 65 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:37,057 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 481 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-11 00:50:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2022-02-11 00:50:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1278688524590166) internal successors, (649), 305 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2022-02-11 00:50:37,061 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2022-02-11 00:50:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:37,061 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2022-02-11 00:50:37,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) 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) [2022-02-11 00:50:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2022-02-11 00:50:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-11 00:50:37,062 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:37,062 INFO L515 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:37,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:37,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-11 00:50:37,278 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:37,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1162487499, now seen corresponding path program 20 times [2022-02-11 00:50:37,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:37,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430488126] [2022-02-11 00:50:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:37,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:37,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:37,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430488126] [2022-02-11 00:50:37,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430488126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:37,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185960629] [2022-02-11 00:50:37,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:37,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:37,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:37,445 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) [2022-02-11 00:50:37,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 00:50:37,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:50:37,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:37,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:38,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185960629] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:38,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:38,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 45 [2022-02-11 00:50:38,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774933708] [2022-02-11 00:50:38,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:38,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 00:50:38,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 00:50:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:50:38,079 INFO L87 Difference]: Start difference. First operand 306 states and 649 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:41,283 INFO L93 Difference]: Finished difference Result 1958 states and 3757 transitions. [2022-02-11 00:50:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-11 00:50:41,284 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-02-11 00:50:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:41,288 INFO L225 Difference]: With dead ends: 1958 [2022-02-11 00:50:41,288 INFO L226 Difference]: Without dead ends: 1505 [2022-02-11 00:50:41,290 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11172 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7852, Invalid=24368, Unknown=0, NotChecked=0, Total=32220 [2022-02-11 00:50:41,290 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 739 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:41,291 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 230 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:50:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2022-02-11 00:50:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 203. [2022-02-11 00:50:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.0297029702970297) internal successors, (410), 202 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2022-02-11 00:50:41,298 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2022-02-11 00:50:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:41,298 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2022-02-11 00:50:41,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2022-02-11 00:50:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-11 00:50:41,298 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:41,299 INFO L515 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:41,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:41,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-11 00:50:41,511 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash 702420365, now seen corresponding path program 21 times [2022-02-11 00:50:41,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:41,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765197549] [2022-02-11 00:50:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:41,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:41,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:41,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765197549] [2022-02-11 00:50:41,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765197549] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:41,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366920628] [2022-02-11 00:50:41,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:41,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:41,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:41,626 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) [2022-02-11 00:50:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 00:50:41,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-11 00:50:41,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:50:41,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:42,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:42,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366920628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:42,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:42,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 19] total 44 [2022-02-11 00:50:42,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847940626] [2022-02-11 00:50:42,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:42,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-11 00:50:42,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:42,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-11 00:50:42,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1475, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:50:42,318 INFO L87 Difference]: Start difference. First operand 203 states and 410 transitions. Second operand has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:44,403 INFO L93 Difference]: Finished difference Result 1020 states and 2014 transitions. [2022-02-11 00:50:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-11 00:50:44,404 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-02-11 00:50:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:44,407 INFO L225 Difference]: With dead ends: 1020 [2022-02-11 00:50:44,407 INFO L226 Difference]: Without dead ends: 1016 [2022-02-11 00:50:44,409 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6775 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5439, Invalid=14867, Unknown=0, NotChecked=0, Total=20306 [2022-02-11 00:50:44,409 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 469 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:44,409 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 132 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:50:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-02-11 00:50:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2022-02-11 00:50:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0402298850574714) internal successors, (355), 174 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2022-02-11 00:50:44,414 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2022-02-11 00:50:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:44,415 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2022-02-11 00:50:44,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2022-02-11 00:50:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-11 00:50:44,415 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:44,415 INFO L515 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:44,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:44,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:44,629 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -463916023, now seen corresponding path program 22 times [2022-02-11 00:50:44,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:44,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344365713] [2022-02-11 00:50:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:44,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:44,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344365713] [2022-02-11 00:50:44,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344365713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:44,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340251987] [2022-02-11 00:50:44,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:44,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:44,749 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) [2022-02-11 00:50:44,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 00:50:44,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:44,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:50:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:44,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:45,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340251987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:45,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:45,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-02-11 00:50:45,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726016346] [2022-02-11 00:50:45,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:45,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:50:45,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:50:45,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:50:45,062 INFO L87 Difference]: Start difference. First operand 175 states and 355 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:45,218 INFO L93 Difference]: Finished difference Result 517 states and 1012 transitions. [2022-02-11 00:50:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:50:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-02-11 00:50:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:45,219 INFO L225 Difference]: With dead ends: 517 [2022-02-11 00:50:45,219 INFO L226 Difference]: Without dead ends: 454 [2022-02-11 00:50:45,220 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:50:45,220 INFO L934 BasicCegarLoop]: 69 mSDtfsCounter, 74 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:45,220 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 603 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-11 00:50:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2022-02-11 00:50:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.1333333333333333) internal successors, (736), 345 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2022-02-11 00:50:45,225 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2022-02-11 00:50:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:45,225 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2022-02-11 00:50:45,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2022-02-11 00:50:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-11 00:50:45,226 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:45,226 INFO L515 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:45,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-11 00:50:45,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:45,442 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2125458571, now seen corresponding path program 23 times [2022-02-11 00:50:45,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:45,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250857127] [2022-02-11 00:50:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:45,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:45,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:45,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250857127] [2022-02-11 00:50:45,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250857127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:45,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545353830] [2022-02-11 00:50:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:45,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:45,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:45,652 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) [2022-02-11 00:50:45,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 00:50:45,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-11 00:50:45,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:50:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:46,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:46,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545353830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:46,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:46,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2022-02-11 00:50:46,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839064732] [2022-02-11 00:50:46,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:46,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-11 00:50:46,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-11 00:50:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2062, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:50:46,335 INFO L87 Difference]: Start difference. First operand 346 states and 736 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:50,535 INFO L93 Difference]: Finished difference Result 2394 states and 4593 transitions. [2022-02-11 00:50:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-02-11 00:50:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-02-11 00:50:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:50,540 INFO L225 Difference]: With dead ends: 2394 [2022-02-11 00:50:50,540 INFO L226 Difference]: Without dead ends: 1821 [2022-02-11 00:50:50,542 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16656 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=11178, Invalid=34832, Unknown=0, NotChecked=0, Total=46010 [2022-02-11 00:50:50,543 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 707 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:50,543 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 295 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:50:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2022-02-11 00:50:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 225. [2022-02-11 00:50:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2022-02-11 00:50:50,551 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2022-02-11 00:50:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:50,551 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2022-02-11 00:50:50,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2022-02-11 00:50:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-11 00:50:50,552 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:50,552 INFO L515 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:50,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:50,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-11 00:50:50,765 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:50,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:50,766 INFO L85 PathProgramCache]: Analyzing trace with hash -827703407, now seen corresponding path program 24 times [2022-02-11 00:50:50,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:50,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697925390] [2022-02-11 00:50:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:50,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:50,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:50,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697925390] [2022-02-11 00:50:50,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697925390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:50,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987792346] [2022-02-11 00:50:50,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:50,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:50,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:50,903 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) [2022-02-11 00:50:50,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 00:50:50,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-02-11 00:50:50,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:50:50,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:51,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:51,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987792346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:51,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:51,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 49 [2022-02-11 00:50:51,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97284610] [2022-02-11 00:50:51,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:51,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-11 00:50:51,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-11 00:50:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1833, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:50:51,683 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:54,314 INFO L93 Difference]: Finished difference Result 1242 states and 2458 transitions. [2022-02-11 00:50:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-11 00:50:54,314 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-02-11 00:50:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:54,317 INFO L225 Difference]: With dead ends: 1242 [2022-02-11 00:50:54,317 INFO L226 Difference]: Without dead ends: 1238 [2022-02-11 00:50:54,319 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9854 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7546, Invalid=20846, Unknown=0, NotChecked=0, Total=28392 [2022-02-11 00:50:54,320 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 612 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:54,320 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 136 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:50:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-02-11 00:50:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2022-02-11 00:50:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.046875) internal successors, (393), 192 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2022-02-11 00:50:54,325 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2022-02-11 00:50:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:54,325 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2022-02-11 00:50:54,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2022-02-11 00:50:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-11 00:50:54,326 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:54,326 INFO L515 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:54,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-11 00:50:54,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-11 00:50:54,539 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1533315529, now seen corresponding path program 25 times [2022-02-11 00:50:54,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:54,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383394234] [2022-02-11 00:50:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:54,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:54,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383394234] [2022-02-11 00:50:54,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383394234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:54,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449955177] [2022-02-11 00:50:54,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:54,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:54,651 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) [2022-02-11 00:50:54,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 00:50:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:54,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:50:54,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:54,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:54,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449955177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:54,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:54,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-02-11 00:50:54,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924552026] [2022-02-11 00:50:54,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:54,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 00:50:54,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 00:50:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:50:54,998 INFO L87 Difference]: Start difference. First operand 193 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:55,199 INFO L93 Difference]: Finished difference Result 576 states and 1129 transitions. [2022-02-11 00:50:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:50:55,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-02-11 00:50:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:55,201 INFO L225 Difference]: With dead ends: 576 [2022-02-11 00:50:55,201 INFO L226 Difference]: Without dead ends: 507 [2022-02-11 00:50:55,201 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:50:55,201 INFO L934 BasicCegarLoop]: 76 mSDtfsCounter, 83 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:55,201 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 739 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-11 00:50:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2022-02-11 00:50:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.137662337662338) internal successors, (823), 385 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2022-02-11 00:50:55,206 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2022-02-11 00:50:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:55,206 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2022-02-11 00:50:55,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2022-02-11 00:50:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-11 00:50:55,207 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:55,207 INFO L515 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:55,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:55,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-11 00:50:55,423 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 46608715, now seen corresponding path program 26 times [2022-02-11 00:50:55,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:55,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120280345] [2022-02-11 00:50:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:55,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:55,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:55,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120280345] [2022-02-11 00:50:55,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120280345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:55,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590449157] [2022-02-11 00:50:55,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:55,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:55,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:55,637 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) [2022-02-11 00:50:55,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 00:50:55,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:55,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:50:55,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:56,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:56,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590449157] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:56,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:56,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 55 [2022-02-11 00:50:56,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146674350] [2022-02-11 00:50:56,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:56,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-11 00:50:56,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-11 00:50:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=2499, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:50:56,409 INFO L87 Difference]: Start difference. First operand 386 states and 823 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:01,731 INFO L93 Difference]: Finished difference Result 2870 states and 5505 transitions. [2022-02-11 00:51:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-02-11 00:51:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-02-11 00:51:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:01,737 INFO L225 Difference]: With dead ends: 2870 [2022-02-11 00:51:01,737 INFO L226 Difference]: Without dead ends: 2165 [2022-02-11 00:51:01,740 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23988 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15464, Invalid=48292, Unknown=0, NotChecked=0, Total=63756 [2022-02-11 00:51:01,740 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 818 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:01,740 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 306 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:51:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2022-02-11 00:51:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 247. [2022-02-11 00:51:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.040650406504065) internal successors, (502), 246 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2022-02-11 00:51:01,749 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2022-02-11 00:51:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:01,749 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2022-02-11 00:51:01,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2022-02-11 00:51:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-11 00:51:01,750 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:01,750 INFO L515 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:01,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:01,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-11 00:51:01,963 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:01,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2116020117, now seen corresponding path program 27 times [2022-02-11 00:51:01,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:01,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505998157] [2022-02-11 00:51:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:01,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:02,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:02,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505998157] [2022-02-11 00:51:02,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505998157] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:02,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028316930] [2022-02-11 00:51:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:02,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:02,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:02,112 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) [2022-02-11 00:51:02,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 00:51:02,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-02-11 00:51:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:02,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:51:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:02,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:03,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028316930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:03,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:03,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 23] total 54 [2022-02-11 00:51:03,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691794188] [2022-02-11 00:51:03,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:03,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-11 00:51:03,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:03,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-11 00:51:03,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=2230, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:51:03,048 INFO L87 Difference]: Start difference. First operand 247 states and 502 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:06,381 INFO L93 Difference]: Finished difference Result 1486 states and 2946 transitions. [2022-02-11 00:51:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-11 00:51:06,382 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-02-11 00:51:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:06,386 INFO L225 Difference]: With dead ends: 1486 [2022-02-11 00:51:06,386 INFO L226 Difference]: Without dead ends: 1482 [2022-02-11 00:51:06,388 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13887 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10199, Invalid=28413, Unknown=0, NotChecked=0, Total=38612 [2022-02-11 00:51:06,388 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 711 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:06,388 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 141 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:51:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-02-11 00:51:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2022-02-11 00:51:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.052380952380952) internal successors, (431), 210 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2022-02-11 00:51:06,405 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2022-02-11 00:51:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:06,405 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2022-02-11 00:51:06,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2022-02-11 00:51:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-11 00:51:06,406 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:06,406 INFO L515 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:06,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:06,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:06,607 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash 918396553, now seen corresponding path program 28 times [2022-02-11 00:51:06,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:06,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842013194] [2022-02-11 00:51:06,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:06,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:06,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:06,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842013194] [2022-02-11 00:51:06,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842013194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:06,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978794704] [2022-02-11 00:51:06,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:06,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:06,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:06,756 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) [2022-02-11 00:51:06,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 00:51:06,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:06,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:51:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:06,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:07,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978794704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:07,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:07,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-02-11 00:51:07,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433067020] [2022-02-11 00:51:07,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:07,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:51:07,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:51:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:51:07,123 INFO L87 Difference]: Start difference. First operand 211 states and 431 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2022-02-11 00:51:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:07,356 INFO L93 Difference]: Finished difference Result 635 states and 1246 transitions. [2022-02-11 00:51:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:51:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 55 [2022-02-11 00:51:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:07,357 INFO L225 Difference]: With dead ends: 635 [2022-02-11 00:51:07,357 INFO L226 Difference]: Without dead ends: 560 [2022-02-11 00:51:07,358 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:51:07,358 INFO L934 BasicCegarLoop]: 83 mSDtfsCounter, 92 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:07,358 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 889 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:51:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-02-11 00:51:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2022-02-11 00:51:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1411764705882352) internal successors, (910), 425 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2022-02-11 00:51:07,363 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2022-02-11 00:51:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:07,363 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2022-02-11 00:51:07,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2022-02-11 00:51:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2022-02-11 00:51:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-11 00:51:07,364 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:07,364 INFO L515 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:07,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:07,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:07,575 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1784892149, now seen corresponding path program 29 times [2022-02-11 00:51:07,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:07,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41301962] [2022-02-11 00:51:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:07,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:07,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:07,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41301962] [2022-02-11 00:51:07,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41301962] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:07,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827501499] [2022-02-11 00:51:07,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:07,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:07,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:07,856 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) [2022-02-11 00:51:07,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 00:51:07,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-11 00:51:07,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:07,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:51:07,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:08,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:08,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827501499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:08,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:08,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2022-02-11 00:51:08,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90977701] [2022-02-11 00:51:08,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:08,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-11 00:51:08,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-11 00:51:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2978, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:51:08,731 INFO L87 Difference]: Start difference. First operand 426 states and 910 transitions. Second operand has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:15,499 INFO L93 Difference]: Finished difference Result 3386 states and 6493 transitions. [2022-02-11 00:51:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-02-11 00:51:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-02-11 00:51:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:15,506 INFO L225 Difference]: With dead ends: 3386 [2022-02-11 00:51:15,506 INFO L226 Difference]: Without dead ends: 2537 [2022-02-11 00:51:15,510 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33558 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=20880, Invalid=65262, Unknown=0, NotChecked=0, Total=86142 [2022-02-11 00:51:15,510 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 904 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:15,510 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 357 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:51:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-02-11 00:51:15,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 269. [2022-02-11 00:51:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.044776119402985) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2022-02-11 00:51:15,521 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2022-02-11 00:51:15,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:15,521 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2022-02-11 00:51:15,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2022-02-11 00:51:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-11 00:51:15,521 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:15,521 INFO L515 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:15,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:15,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-02-11 00:51:15,733 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash -565703271, now seen corresponding path program 30 times [2022-02-11 00:51:15,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:15,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827448814] [2022-02-11 00:51:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:15,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:15,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827448814] [2022-02-11 00:51:15,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827448814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:15,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746998547] [2022-02-11 00:51:15,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:51:15,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:15,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:15,887 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) [2022-02-11 00:51:15,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 00:51:15,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-02-11 00:51:15,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:51:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:16,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:16,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746998547] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:16,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:16,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 25] total 59 [2022-02-11 00:51:16,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773823706] [2022-02-11 00:51:16,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:16,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-11 00:51:16,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-11 00:51:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=2666, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:51:16,935 INFO L87 Difference]: Start difference. First operand 269 states and 548 transitions. Second operand has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 59 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:21,138 INFO L93 Difference]: Finished difference Result 1752 states and 3478 transitions. [2022-02-11 00:51:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-11 00:51:21,138 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 59 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-02-11 00:51:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:21,141 INFO L225 Difference]: With dead ends: 1752 [2022-02-11 00:51:21,141 INFO L226 Difference]: Without dead ends: 1748 [2022-02-11 00:51:21,143 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19057 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=13483, Invalid=37819, Unknown=0, NotChecked=0, Total=51302 [2022-02-11 00:51:21,143 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 868 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:21,144 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 170 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:51:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2022-02-11 00:51:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2022-02-11 00:51:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.057017543859649) internal successors, (469), 228 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2022-02-11 00:51:21,151 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2022-02-11 00:51:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:21,151 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2022-02-11 00:51:21,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 59 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2022-02-11 00:51:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-11 00:51:21,151 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:21,151 INFO L515 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:21,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-11 00:51:21,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:21,353 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1782657609, now seen corresponding path program 31 times [2022-02-11 00:51:21,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:21,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839926264] [2022-02-11 00:51:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:21,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:21,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:21,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839926264] [2022-02-11 00:51:21,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839926264] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:21,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8049057] [2022-02-11 00:51:21,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:51:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:21,508 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) [2022-02-11 00:51:21,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 00:51:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:51:21,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:21,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:21,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8049057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:21,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:21,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-02-11 00:51:21,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491035553] [2022-02-11 00:51:21,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:21,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:51:21,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:21,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:51:21,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:51:21,867 INFO L87 Difference]: Start difference. First operand 229 states and 469 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:22,148 INFO L93 Difference]: Finished difference Result 694 states and 1363 transitions. [2022-02-11 00:51:22,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:51:22,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-02-11 00:51:22,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:22,150 INFO L225 Difference]: With dead ends: 694 [2022-02-11 00:51:22,150 INFO L226 Difference]: Without dead ends: 613 [2022-02-11 00:51:22,150 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:51:22,150 INFO L934 BasicCegarLoop]: 90 mSDtfsCounter, 101 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:22,150 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1053 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:51:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-11 00:51:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2022-02-11 00:51:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.1440860215053763) internal successors, (997), 465 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2022-02-11 00:51:22,157 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2022-02-11 00:51:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:22,157 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2022-02-11 00:51:22,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2022-02-11 00:51:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-11 00:51:22,158 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:22,158 INFO L515 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:22,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-11 00:51:22,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:22,371 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2127378379, now seen corresponding path program 32 times [2022-02-11 00:51:22,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:22,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823383504] [2022-02-11 00:51:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:22,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:22,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:22,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823383504] [2022-02-11 00:51:22,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823383504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:22,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629858449] [2022-02-11 00:51:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:51:22,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:22,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:22,670 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) [2022-02-11 00:51:22,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 00:51:22,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:51:22,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 00:51:22,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:23,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:23,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629858449] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:23,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:23,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 65 [2022-02-11 00:51:23,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760885647] [2022-02-11 00:51:23,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:23,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-11 00:51:23,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-11 00:51:23,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3499, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:51:23,639 INFO L87 Difference]: Start difference. First operand 466 states and 997 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:32,205 INFO L93 Difference]: Finished difference Result 3942 states and 7557 transitions. [2022-02-11 00:51:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-02-11 00:51:32,206 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-02-11 00:51:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:32,209 INFO L225 Difference]: With dead ends: 3942 [2022-02-11 00:51:32,209 INFO L226 Difference]: Without dead ends: 2937 [2022-02-11 00:51:32,213 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45785 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=27610, Invalid=86296, Unknown=0, NotChecked=0, Total=113906 [2022-02-11 00:51:32,214 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1116 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:32,214 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 398 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:51:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2022-02-11 00:51:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 291. [2022-02-11 00:51:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2022-02-11 00:51:32,225 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2022-02-11 00:51:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:32,225 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2022-02-11 00:51:32,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2022-02-11 00:51:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-11 00:51:32,226 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:32,226 INFO L515 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:32,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-11 00:51:32,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-11 00:51:32,426 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1968459363, now seen corresponding path program 33 times [2022-02-11 00:51:32,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:32,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710135122] [2022-02-11 00:51:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:32,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:32,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710135122] [2022-02-11 00:51:32,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710135122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:32,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754703359] [2022-02-11 00:51:32,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:32,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:32,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:32,601 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) [2022-02-11 00:51:32,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 00:51:32,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-02-11 00:51:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 00:51:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:33,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:33,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754703359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:33,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:33,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 27] total 64 [2022-02-11 00:51:33,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703951245] [2022-02-11 00:51:33,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:33,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-11 00:51:33,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-11 00:51:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:51:33,741 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:38,808 INFO L93 Difference]: Finished difference Result 2040 states and 4054 transitions. [2022-02-11 00:51:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-02-11 00:51:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-02-11 00:51:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:38,811 INFO L225 Difference]: With dead ends: 2040 [2022-02-11 00:51:38,811 INFO L226 Difference]: Without dead ends: 2036 [2022-02-11 00:51:38,814 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25563 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=17489, Invalid=49333, Unknown=0, NotChecked=0, Total=66822 [2022-02-11 00:51:38,814 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 768 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:38,814 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 167 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:51:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-02-11 00:51:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2022-02-11 00:51:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 246 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2022-02-11 00:51:38,822 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2022-02-11 00:51:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:38,823 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2022-02-11 00:51:38,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2022-02-11 00:51:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-11 00:51:38,823 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:38,823 INFO L515 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:38,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:39,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-11 00:51:39,039 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:39,039 INFO L85 PathProgramCache]: Analyzing trace with hash -916716279, now seen corresponding path program 34 times [2022-02-11 00:51:39,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:39,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644577987] [2022-02-11 00:51:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:39,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:39,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644577987] [2022-02-11 00:51:39,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644577987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:39,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390392057] [2022-02-11 00:51:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:39,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:39,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:39,217 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) [2022-02-11 00:51:39,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 00:51:39,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:39,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-11 00:51:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:39,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:39,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390392057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:39,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:39,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-02-11 00:51:39,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236470099] [2022-02-11 00:51:39,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:39,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:51:39,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:51:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:51:39,638 INFO L87 Difference]: Start difference. First operand 247 states and 507 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:39,954 INFO L93 Difference]: Finished difference Result 753 states and 1480 transitions. [2022-02-11 00:51:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:51:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-02-11 00:51:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:39,962 INFO L225 Difference]: With dead ends: 753 [2022-02-11 00:51:39,963 INFO L226 Difference]: Without dead ends: 666 [2022-02-11 00:51:39,963 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:51:39,963 INFO L934 BasicCegarLoop]: 97 mSDtfsCounter, 110 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:39,963 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1231 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:51:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-02-11 00:51:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2022-02-11 00:51:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.1465346534653467) internal successors, (1084), 505 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2022-02-11 00:51:39,970 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2022-02-11 00:51:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:39,970 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2022-02-11 00:51:39,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2022-02-11 00:51:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-11 00:51:39,971 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:39,971 INFO L515 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:39,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:40,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-11 00:51:40,183 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:40,184 INFO L85 PathProgramCache]: Analyzing trace with hash 92633483, now seen corresponding path program 35 times [2022-02-11 00:51:40,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:40,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892956636] [2022-02-11 00:51:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:40,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:40,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:40,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892956636] [2022-02-11 00:51:40,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892956636] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:40,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181959813] [2022-02-11 00:51:40,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:40,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:40,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:40,496 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) [2022-02-11 00:51:40,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 00:51:40,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-02-11 00:51:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:51:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:41,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:41,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181959813] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:41,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:41,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 70 [2022-02-11 00:51:41,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430548022] [2022-02-11 00:51:41,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:41,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-11 00:51:41,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-11 00:51:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=4062, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:51:41,596 INFO L87 Difference]: Start difference. First operand 506 states and 1084 transitions. Second operand has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:52,081 INFO L93 Difference]: Finished difference Result 4538 states and 8697 transitions. [2022-02-11 00:51:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2022-02-11 00:51:52,081 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-02-11 00:51:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:52,086 INFO L225 Difference]: With dead ends: 4538 [2022-02-11 00:51:52,086 INFO L226 Difference]: Without dead ends: 3365 [2022-02-11 00:51:52,090 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61134 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=35852, Invalid=111988, Unknown=0, NotChecked=0, Total=147840 [2022-02-11 00:51:52,091 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1179 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:52,091 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 443 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:51:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-02-11 00:51:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 313. [2022-02-11 00:51:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.051282051282051) internal successors, (640), 312 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2022-02-11 00:51:52,105 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2022-02-11 00:51:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:52,105 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2022-02-11 00:51:52,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2022-02-11 00:51:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-11 00:51:52,106 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:52,106 INFO L515 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:52,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:52,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:52,319 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash -732703839, now seen corresponding path program 36 times [2022-02-11 00:51:52,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:52,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591907091] [2022-02-11 00:51:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:52,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:52,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:52,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591907091] [2022-02-11 00:51:52,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591907091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:52,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397897521] [2022-02-11 00:51:52,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:51:52,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:52,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:52,515 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) [2022-02-11 00:51:52,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 00:51:52,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-02-11 00:51:52,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:51:52,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397897521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:53,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:53,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 29] total 69 [2022-02-11 00:51:53,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284133710] [2022-02-11 00:51:53,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:53,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-11 00:51:53,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-11 00:51:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1175, Invalid=3655, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:51:53,797 INFO L87 Difference]: Start difference. First operand 313 states and 640 transitions. Second operand has 70 states, 70 states have (on average 2.4714285714285715) internal successors, (173), 69 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:59,937 INFO L93 Difference]: Finished difference Result 2350 states and 4674 transitions. [2022-02-11 00:51:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-02-11 00:51:59,937 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4714285714285715) internal successors, (173), 69 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-02-11 00:51:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:59,940 INFO L225 Difference]: With dead ends: 2350 [2022-02-11 00:51:59,940 INFO L226 Difference]: Without dead ends: 2346 [2022-02-11 00:51:59,944 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33621 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=22314, Invalid=63242, Unknown=0, NotChecked=0, Total=85556 [2022-02-11 00:51:59,944 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1022 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:59,944 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 172 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:51:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2022-02-11 00:51:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2022-02-11 00:51:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.0643939393939394) internal successors, (545), 264 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2022-02-11 00:51:59,954 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2022-02-11 00:51:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:59,954 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2022-02-11 00:51:59,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4714285714285715) internal successors, (173), 69 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2022-02-11 00:51:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-11 00:51:59,954 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:59,954 INFO L515 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:59,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:00,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 00:52:00,167 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2096441655, now seen corresponding path program 37 times [2022-02-11 00:52:00,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:00,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83269085] [2022-02-11 00:52:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:00,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:00,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:00,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83269085] [2022-02-11 00:52:00,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83269085] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:00,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128664805] [2022-02-11 00:52:00,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:00,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:00,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:00,356 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) [2022-02-11 00:52:00,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 00:52:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:00,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-11 00:52:00,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:00,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:00,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128664805] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:00,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:00,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-02-11 00:52:00,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455731537] [2022-02-11 00:52:00,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:00,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:52:00,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:00,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:52:00,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:52:00,757 INFO L87 Difference]: Start difference. First operand 265 states and 545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:01,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:01,134 INFO L93 Difference]: Finished difference Result 812 states and 1597 transitions. [2022-02-11 00:52:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:52:01,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-02-11 00:52:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:01,136 INFO L225 Difference]: With dead ends: 812 [2022-02-11 00:52:01,136 INFO L226 Difference]: Without dead ends: 719 [2022-02-11 00:52:01,136 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:52:01,136 INFO L934 BasicCegarLoop]: 104 mSDtfsCounter, 119 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:01,136 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1423 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:52:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-02-11 00:52:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2022-02-11 00:52:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.148623853211009) internal successors, (1171), 545 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2022-02-11 00:52:01,143 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2022-02-11 00:52:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:01,143 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2022-02-11 00:52:01,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2022-02-11 00:52:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-11 00:52:01,144 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:01,144 INFO L515 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:01,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:01,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 00:52:01,361 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:01,361 INFO L85 PathProgramCache]: Analyzing trace with hash -327009717, now seen corresponding path program 38 times [2022-02-11 00:52:01,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:01,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061056091] [2022-02-11 00:52:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:01,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:01,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:01,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061056091] [2022-02-11 00:52:01,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061056091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:01,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931924240] [2022-02-11 00:52:01,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:01,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:01,782 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) [2022-02-11 00:52:01,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 00:52:01,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:01,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:01,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:02,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:03,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931924240] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:03,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:03,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 75 [2022-02-11 00:52:03,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807933301] [2022-02-11 00:52:03,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:03,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-11 00:52:03,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:03,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-11 00:52:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=4667, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:52:03,070 INFO L87 Difference]: Start difference. First operand 546 states and 1171 transitions. Second operand has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:16,041 INFO L93 Difference]: Finished difference Result 5174 states and 9913 transitions. [2022-02-11 00:52:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-02-11 00:52:16,041 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-02-11 00:52:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:16,046 INFO L225 Difference]: With dead ends: 5174 [2022-02-11 00:52:16,046 INFO L226 Difference]: Without dead ends: 3821 [2022-02-11 00:52:16,052 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80099 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=45818, Invalid=142972, Unknown=0, NotChecked=0, Total=188790 [2022-02-11 00:52:16,053 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1026 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:16,053 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 491 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 3353 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:52:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2022-02-11 00:52:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 335. [2022-02-11 00:52:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.053892215568862) internal successors, (686), 334 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2022-02-11 00:52:16,069 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2022-02-11 00:52:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:16,069 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2022-02-11 00:52:16,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2022-02-11 00:52:16,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-11 00:52:16,070 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:16,070 INFO L515 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:16,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:16,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:16,286 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:16,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2117504091, now seen corresponding path program 39 times [2022-02-11 00:52:16,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:16,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824059942] [2022-02-11 00:52:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:16,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:16,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:16,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824059942] [2022-02-11 00:52:16,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824059942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:16,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722150587] [2022-02-11 00:52:16,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:52:16,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:16,512 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) [2022-02-11 00:52:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 00:52:16,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-02-11 00:52:16,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:16,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:17,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:17,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722150587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:17,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:17,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31, 31] total 74 [2022-02-11 00:52:17,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216386477] [2022-02-11 00:52:17,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:17,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-11 00:52:17,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:17,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-11 00:52:17,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=4208, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:52:17,951 INFO L87 Difference]: Start difference. First operand 335 states and 686 transitions. Second operand has 75 states, 75 states have (on average 2.466666666666667) internal successors, (185), 74 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:25,303 INFO L93 Difference]: Finished difference Result 2682 states and 5338 transitions. [2022-02-11 00:52:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-02-11 00:52:25,304 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.466666666666667) internal successors, (185), 74 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-02-11 00:52:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:25,306 INFO L225 Difference]: With dead ends: 2682 [2022-02-11 00:52:25,306 INFO L226 Difference]: Without dead ends: 2678 [2022-02-11 00:52:25,310 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43463 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=28061, Invalid=79851, Unknown=0, NotChecked=0, Total=107912 [2022-02-11 00:52:25,311 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 949 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:25,311 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 197 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:52:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2022-02-11 00:52:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2022-02-11 00:52:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0673758865248226) internal successors, (583), 282 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2022-02-11 00:52:25,321 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2022-02-11 00:52:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:25,321 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2022-02-11 00:52:25,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.466666666666667) internal successors, (185), 74 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2022-02-11 00:52:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-11 00:52:25,322 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:25,322 INFO L515 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:25,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:25,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-11 00:52:25,535 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1646631031, now seen corresponding path program 40 times [2022-02-11 00:52:25,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:25,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237594267] [2022-02-11 00:52:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:25,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:25,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:25,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237594267] [2022-02-11 00:52:25,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237594267] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:25,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051615457] [2022-02-11 00:52:25,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:52:25,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:25,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:25,730 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) [2022-02-11 00:52:25,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 00:52:25,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:52:25,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2022-02-11 00:52:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:25,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:26,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051615457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:26,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:26,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2022-02-11 00:52:26,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393407231] [2022-02-11 00:52:26,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:26,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:52:26,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:52:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:52:26,166 INFO L87 Difference]: Start difference. First operand 283 states and 583 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:26,608 INFO L93 Difference]: Finished difference Result 871 states and 1714 transitions. [2022-02-11 00:52:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:52:26,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-02-11 00:52:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:26,609 INFO L225 Difference]: With dead ends: 871 [2022-02-11 00:52:26,609 INFO L226 Difference]: Without dead ends: 772 [2022-02-11 00:52:26,609 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:52:26,610 INFO L934 BasicCegarLoop]: 111 mSDtfsCounter, 128 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:26,610 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1629 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:52:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-02-11 00:52:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2022-02-11 00:52:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1504273504273503) internal successors, (1258), 585 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2022-02-11 00:52:26,618 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2022-02-11 00:52:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:26,618 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2022-02-11 00:52:26,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2022-02-11 00:52:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-11 00:52:26,619 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:26,619 INFO L515 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:26,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-11 00:52:26,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:26,823 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:26,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:26,824 INFO L85 PathProgramCache]: Analyzing trace with hash -300926453, now seen corresponding path program 41 times [2022-02-11 00:52:26,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:26,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631253241] [2022-02-11 00:52:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:26,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:27,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:27,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631253241] [2022-02-11 00:52:27,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631253241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:27,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315741277] [2022-02-11 00:52:27,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:52:27,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:27,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:27,255 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) [2022-02-11 00:52:27,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 00:52:27,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-02-11 00:52:27,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:28,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:28,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315741277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:28,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:28,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 80 [2022-02-11 00:52:28,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462437940] [2022-02-11 00:52:28,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:28,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-11 00:52:28,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-11 00:52:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=5314, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 00:52:28,632 INFO L87 Difference]: Start difference. First operand 586 states and 1258 transitions. Second operand has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:44,298 INFO L93 Difference]: Finished difference Result 5850 states and 11205 transitions. [2022-02-11 00:52:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 411 states. [2022-02-11 00:52:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-02-11 00:52:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:44,304 INFO L225 Difference]: With dead ends: 5850 [2022-02-11 00:52:44,304 INFO L226 Difference]: Without dead ends: 4305 [2022-02-11 00:52:44,313 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103220 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=57734, Invalid=179922, Unknown=0, NotChecked=0, Total=237656 [2022-02-11 00:52:44,313 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1381 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3691 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 3691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:44,313 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 572 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 3691 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 00:52:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2022-02-11 00:52:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 357. [2022-02-11 00:52:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.056179775280899) internal successors, (732), 356 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2022-02-11 00:52:44,330 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2022-02-11 00:52:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:44,330 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2022-02-11 00:52:44,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2022-02-11 00:52:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-11 00:52:44,331 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:44,331 INFO L515 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:44,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-11 00:52:44,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:44,544 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1894411863, now seen corresponding path program 42 times [2022-02-11 00:52:44,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:44,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289256127] [2022-02-11 00:52:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:44,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:44,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289256127] [2022-02-11 00:52:44,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289256127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:44,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390840426] [2022-02-11 00:52:44,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:44,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:44,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:44,812 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) [2022-02-11 00:52:44,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 00:52:44,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-02-11 00:52:44,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:45,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:46,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390840426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:46,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:46,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33, 33] total 79 [2022-02-11 00:52:46,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761053477] [2022-02-11 00:52:46,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:46,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-11 00:52:46,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:46,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-11 00:52:46,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4800, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:52:46,425 INFO L87 Difference]: Start difference. First operand 357 states and 732 transitions. Second operand has 80 states, 80 states have (on average 2.4625) internal successors, (197), 79 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:55,406 INFO L93 Difference]: Finished difference Result 3036 states and 6046 transitions. [2022-02-11 00:52:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-02-11 00:52:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.4625) internal successors, (197), 79 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-02-11 00:52:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:55,409 INFO L225 Difference]: With dead ends: 3036 [2022-02-11 00:52:55,409 INFO L226 Difference]: Without dead ends: 3032 [2022-02-11 00:52:55,413 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55338 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=34839, Invalid=99483, Unknown=0, NotChecked=0, Total=134322 [2022-02-11 00:52:55,413 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1032 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:55,414 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 222 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:52:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2022-02-11 00:52:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2022-02-11 00:52:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.07) internal successors, (621), 300 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2022-02-11 00:52:55,426 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2022-02-11 00:52:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:55,426 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2022-02-11 00:52:55,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.4625) internal successors, (197), 79 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2022-02-11 00:52:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-11 00:52:55,427 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:55,427 INFO L515 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:55,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:55,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-11 00:52:55,643 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1944549193, now seen corresponding path program 43 times [2022-02-11 00:52:55,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:55,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160261500] [2022-02-11 00:52:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:55,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:55,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160261500] [2022-02-11 00:52:55,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160261500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:55,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348066285] [2022-02-11 00:52:55,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:55,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:55,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:55,863 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) [2022-02-11 00:52:55,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 00:52:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:55,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2022-02-11 00:52:55,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:56,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:56,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348066285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:56,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:56,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-02-11 00:52:56,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419482000] [2022-02-11 00:52:56,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:56,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:52:56,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:52:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:52:56,331 INFO L87 Difference]: Start difference. First operand 301 states and 621 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:56,806 INFO L93 Difference]: Finished difference Result 930 states and 1831 transitions. [2022-02-11 00:52:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:52:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-02-11 00:52:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:56,807 INFO L225 Difference]: With dead ends: 930 [2022-02-11 00:52:56,807 INFO L226 Difference]: Without dead ends: 825 [2022-02-11 00:52:56,807 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:52:56,808 INFO L934 BasicCegarLoop]: 118 mSDtfsCounter, 137 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:56,808 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1849 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:52:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-02-11 00:52:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2022-02-11 00:52:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.152) internal successors, (1345), 625 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2022-02-11 00:52:56,814 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2022-02-11 00:52:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:56,815 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2022-02-11 00:52:56,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2022-02-11 00:52:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-11 00:52:56,815 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:56,816 INFO L515 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:56,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:57,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-11 00:52:57,019 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash 940325067, now seen corresponding path program 44 times [2022-02-11 00:52:57,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:57,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337160165] [2022-02-11 00:52:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:57,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:57,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337160165] [2022-02-11 00:52:57,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337160165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:57,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047588595] [2022-02-11 00:52:57,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:57,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:57,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:57,455 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) [2022-02-11 00:52:57,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 00:52:57,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:57,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:57,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:52:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:58,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:59,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047588595] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:59,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:59,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 85 [2022-02-11 00:52:59,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217065549] [2022-02-11 00:52:59,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:59,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-11 00:52:59,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-11 00:52:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=6003, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:52:59,017 INFO L87 Difference]: Start difference. First operand 626 states and 1345 transitions. Second operand has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:18,462 INFO L93 Difference]: Finished difference Result 6566 states and 12573 transitions. [2022-02-11 00:53:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 462 states. [2022-02-11 00:53:18,463 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-02-11 00:53:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:18,468 INFO L225 Difference]: With dead ends: 6566 [2022-02-11 00:53:18,468 INFO L226 Difference]: Without dead ends: 4817 [2022-02-11 00:53:18,479 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 542 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131066 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=71840, Invalid=223552, Unknown=0, NotChecked=0, Total=295392 [2022-02-11 00:53:18,480 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1488 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 4264 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 4586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 4264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:18,480 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1488 Valid, 639 Invalid, 4586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 4264 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-11 00:53:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4817 states. [2022-02-11 00:53:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4817 to 379. [2022-02-11 00:53:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.058201058201058) internal successors, (778), 378 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2022-02-11 00:53:18,525 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2022-02-11 00:53:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:18,526 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2022-02-11 00:53:18,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2022-02-11 00:53:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-11 00:53:18,526 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:18,526 INFO L515 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:18,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-11 00:53:18,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-11 00:53:18,727 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:18,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:18,727 INFO L85 PathProgramCache]: Analyzing trace with hash -306106963, now seen corresponding path program 45 times [2022-02-11 00:53:18,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:18,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113583798] [2022-02-11 00:53:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:18,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:18,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:18,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113583798] [2022-02-11 00:53:18,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113583798] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:18,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233898597] [2022-02-11 00:53:18,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:53:18,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:18,994 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) [2022-02-11 00:53:18,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 00:53:19,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-02-11 00:53:19,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:19,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:53:19,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:19,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:20,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233898597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:20,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:20,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 35] total 84 [2022-02-11 00:53:20,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138993949] [2022-02-11 00:53:20,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:20,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-11 00:53:20,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-11 00:53:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5431, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 00:53:20,737 INFO L87 Difference]: Start difference. First operand 379 states and 778 transitions. Second operand has 85 states, 85 states have (on average 2.458823529411765) internal successors, (209), 84 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:31,509 INFO L93 Difference]: Finished difference Result 3412 states and 6798 transitions. [2022-02-11 00:53:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2022-02-11 00:53:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.458823529411765) internal successors, (209), 84 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-02-11 00:53:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:31,513 INFO L225 Difference]: With dead ends: 3412 [2022-02-11 00:53:31,513 INFO L226 Difference]: Without dead ends: 3408 [2022-02-11 00:53:31,521 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69511 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=42763, Invalid=122479, Unknown=0, NotChecked=0, Total=165242 [2022-02-11 00:53:31,521 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1199 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:31,521 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 237 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:53:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-02-11 00:53:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2022-02-11 00:53:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.0723270440251573) internal successors, (659), 318 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2022-02-11 00:53:31,535 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2022-02-11 00:53:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:31,535 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2022-02-11 00:53:31,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.458823529411765) internal successors, (209), 84 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2022-02-11 00:53:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-11 00:53:31,536 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:31,536 INFO L515 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:31,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:31,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:31,744 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash 786351625, now seen corresponding path program 46 times [2022-02-11 00:53:31,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:31,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326688284] [2022-02-11 00:53:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:31,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:31,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326688284] [2022-02-11 00:53:31,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326688284] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:31,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779440366] [2022-02-11 00:53:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:53:31,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:31,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:31,993 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) [2022-02-11 00:53:31,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 00:53:32,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:53:32,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:32,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-11 00:53:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:32,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:32,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779440366] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:32,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:32,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-02-11 00:53:32,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276630868] [2022-02-11 00:53:32,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:32,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:53:32,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:53:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:53:32,548 INFO L87 Difference]: Start difference. First operand 319 states and 659 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:33,084 INFO L93 Difference]: Finished difference Result 989 states and 1948 transitions. [2022-02-11 00:53:33,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:53:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-02-11 00:53:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:33,087 INFO L225 Difference]: With dead ends: 989 [2022-02-11 00:53:33,087 INFO L226 Difference]: Without dead ends: 878 [2022-02-11 00:53:33,087 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:53:33,087 INFO L934 BasicCegarLoop]: 125 mSDtfsCounter, 146 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:33,087 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2083 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:53:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-02-11 00:53:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2022-02-11 00:53:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.1533834586466165) internal successors, (1432), 665 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2022-02-11 00:53:33,094 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2022-02-11 00:53:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:33,094 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2022-02-11 00:53:33,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2022-02-11 00:53:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-11 00:53:33,095 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:33,095 INFO L515 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:33,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-11 00:53:33,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-11 00:53:33,299 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:33,299 INFO L85 PathProgramCache]: Analyzing trace with hash -404556149, now seen corresponding path program 47 times [2022-02-11 00:53:33,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:33,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003287504] [2022-02-11 00:53:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:33,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:33,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003287504] [2022-02-11 00:53:33,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003287504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:33,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736174221] [2022-02-11 00:53:33,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:53:33,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:33,823 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) [2022-02-11 00:53:33,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 00:53:33,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-02-11 00:53:33,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:33,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 00:53:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:35,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736174221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:35,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:35,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 90 [2022-02-11 00:53:35,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179091822] [2022-02-11 00:53:35,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:35,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-11 00:53:35,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-11 00:53:35,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=6734, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 00:53:35,489 INFO L87 Difference]: Start difference. First operand 666 states and 1432 transitions. Second operand has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:58,625 INFO L93 Difference]: Finished difference Result 7322 states and 14017 transitions. [2022-02-11 00:53:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2022-02-11 00:53:58,625 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-02-11 00:53:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:58,631 INFO L225 Difference]: With dead ends: 7322 [2022-02-11 00:53:58,631 INFO L226 Difference]: Without dead ends: 5357 [2022-02-11 00:53:58,642 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164252 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=88390, Invalid=274616, Unknown=0, NotChecked=0, Total=363006 [2022-02-11 00:53:58,643 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1375 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 4259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:58,643 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 666 Invalid, 4259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-11 00:53:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5357 states. [2022-02-11 00:53:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5357 to 401. [2022-02-11 00:53:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.06) internal successors, (824), 400 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2022-02-11 00:53:58,664 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2022-02-11 00:53:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:58,665 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2022-02-11 00:53:58,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2022-02-11 00:53:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-11 00:53:58,665 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:58,665 INFO L515 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:58,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:58,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 00:53:58,866 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1154828209, now seen corresponding path program 48 times [2022-02-11 00:53:58,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:58,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769884327] [2022-02-11 00:53:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:59,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:59,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769884327] [2022-02-11 00:53:59,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769884327] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:59,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049504492] [2022-02-11 00:53:59,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:53:59,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:59,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:59,152 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) [2022-02-11 00:53:59,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 00:53:59,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-02-11 00:53:59,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:59,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 00:53:59,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:00,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:01,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049504492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:01,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:01,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37, 37] total 89 [2022-02-11 00:54:01,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910936217] [2022-02-11 00:54:01,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:01,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-11 00:54:01,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:01,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-11 00:54:01,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1909, Invalid=6101, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 00:54:01,099 INFO L87 Difference]: Start difference. First operand 401 states and 824 transitions. Second operand has 90 states, 90 states have (on average 2.4555555555555557) internal successors, (221), 89 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:13,571 INFO L93 Difference]: Finished difference Result 3810 states and 7594 transitions. [2022-02-11 00:54:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-02-11 00:54:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.4555555555555557) internal successors, (221), 89 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-02-11 00:54:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:13,576 INFO L225 Difference]: With dead ends: 3810 [2022-02-11 00:54:13,576 INFO L226 Difference]: Without dead ends: 3806 [2022-02-11 00:54:13,586 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86264 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=51954, Invalid=149198, Unknown=0, NotChecked=0, Total=201152 [2022-02-11 00:54:13,586 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1123 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:13,587 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 256 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:54:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2022-02-11 00:54:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2022-02-11 00:54:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.074404761904762) internal successors, (697), 336 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2022-02-11 00:54:13,601 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2022-02-11 00:54:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:13,601 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2022-02-11 00:54:13,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.4555555555555557) internal successors, (221), 89 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2022-02-11 00:54:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-11 00:54:13,602 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:13,602 INFO L515 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:54:13,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:13,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:13,815 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:54:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1140659145, now seen corresponding path program 49 times [2022-02-11 00:54:13,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:13,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242196562] [2022-02-11 00:54:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:14,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:14,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242196562] [2022-02-11 00:54:14,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242196562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:14,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666028397] [2022-02-11 00:54:14,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:54:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:14,128 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) [2022-02-11 00:54:14,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 00:54:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2022-02-11 00:54:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:14,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:14,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666028397] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:14,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:14,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-02-11 00:54:14,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886976833] [2022-02-11 00:54:14,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:14,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:54:14,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:54:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:54:14,768 INFO L87 Difference]: Start difference. First operand 337 states and 697 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:15,383 INFO L93 Difference]: Finished difference Result 1048 states and 2065 transitions. [2022-02-11 00:54:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:54:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-02-11 00:54:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:15,384 INFO L225 Difference]: With dead ends: 1048 [2022-02-11 00:54:15,384 INFO L226 Difference]: Without dead ends: 931 [2022-02-11 00:54:15,385 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:54:15,385 INFO L934 BasicCegarLoop]: 132 mSDtfsCounter, 155 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:15,385 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2331 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:54:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-02-11 00:54:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2022-02-11 00:54:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.1546099290780143) internal successors, (1519), 705 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2022-02-11 00:54:15,392 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2022-02-11 00:54:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:15,392 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2022-02-11 00:54:15,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2022-02-11 00:54:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-11 00:54:15,393 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:15,393 INFO L515 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:54:15,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:15,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-11 00:54:15,610 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:54:15,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2037304501, now seen corresponding path program 50 times [2022-02-11 00:54:15,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:15,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332287882] [2022-02-11 00:54:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:16,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:16,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332287882] [2022-02-11 00:54:16,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332287882] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:16,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444618071] [2022-02-11 00:54:16,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:54:16,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:16,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:16,167 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) [2022-02-11 00:54:16,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 00:54:16,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:54:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:16,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:54:16,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:17,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:17,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444618071] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:17,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:17,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 95 [2022-02-11 00:54:17,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880956728] [2022-02-11 00:54:17,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:17,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-11 00:54:17,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:17,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-11 00:54:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=7507, Unknown=0, NotChecked=0, Total=9120 [2022-02-11 00:54:17,979 INFO L87 Difference]: Start difference. First operand 706 states and 1519 transitions. Second operand has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:45,701 INFO L93 Difference]: Finished difference Result 8118 states and 15537 transitions. [2022-02-11 00:54:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 573 states. [2022-02-11 00:54:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-02-11 00:54:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:45,707 INFO L225 Difference]: With dead ends: 8118 [2022-02-11 00:54:45,708 INFO L226 Difference]: Without dead ends: 5925 [2022-02-11 00:54:45,723 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203422 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=107652, Invalid=333908, Unknown=0, NotChecked=0, Total=441560 [2022-02-11 00:54:45,724 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1714 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 5102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:45,724 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1714 Valid, 760 Invalid, 5102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 4737 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-11 00:54:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2022-02-11 00:54:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 423. [2022-02-11 00:54:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.061611374407583) internal successors, (870), 422 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2022-02-11 00:54:45,747 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2022-02-11 00:54:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:45,747 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2022-02-11 00:54:45,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:45,747 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2022-02-11 00:54:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-11 00:54:45,748 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:45,748 INFO L515 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:54:45,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:45,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:45,948 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:54:45,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:45,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1327833163, now seen corresponding path program 51 times [2022-02-11 00:54:45,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:45,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85195030] [2022-02-11 00:54:45,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:45,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:46,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:46,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85195030] [2022-02-11 00:54:46,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85195030] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:46,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566721758] [2022-02-11 00:54:46,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:54:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:46,248 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) [2022-02-11 00:54:46,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 00:54:46,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-02-11 00:54:46,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:46,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:54:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:47,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:48,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566721758] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:48,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:48,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39, 39] total 94 [2022-02-11 00:54:48,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648028687] [2022-02-11 00:54:48,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:48,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-11 00:54:48,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-11 00:54:48,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2120, Invalid=6810, Unknown=0, NotChecked=0, Total=8930 [2022-02-11 00:54:48,447 INFO L87 Difference]: Start difference. First operand 423 states and 870 transitions. Second operand has 95 states, 95 states have (on average 2.4526315789473685) internal successors, (233), 94 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:03,250 INFO L93 Difference]: Finished difference Result 4230 states and 8434 transitions. [2022-02-11 00:55:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-02-11 00:55:03,250 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.4526315789473685) internal successors, (233), 94 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-02-11 00:55:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:03,254 INFO L225 Difference]: With dead ends: 4230 [2022-02-11 00:55:03,254 INFO L226 Difference]: Without dead ends: 4226 [2022-02-11 00:55:03,262 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 491 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105895 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=62539, Invalid=180017, Unknown=0, NotChecked=0, Total=242556 [2022-02-11 00:55:03,263 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1625 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:03,263 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1625 Valid, 280 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:55:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2022-02-11 00:55:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2022-02-11 00:55:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0762711864406778) internal successors, (735), 354 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2022-02-11 00:55:03,277 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2022-02-11 00:55:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:03,278 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2022-02-11 00:55:03,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.4526315789473685) internal successors, (233), 94 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2022-02-11 00:55:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-11 00:55:03,278 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:03,278 INFO L515 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:55:03,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:03,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-02-11 00:55:03,479 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:55:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash -267444087, now seen corresponding path program 52 times [2022-02-11 00:55:03,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:03,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145334114] [2022-02-11 00:55:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:03,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:03,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:03,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145334114] [2022-02-11 00:55:03,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145334114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:03,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977347287] [2022-02-11 00:55:03,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:55:03,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:03,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:03,768 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) [2022-02-11 00:55:03,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 00:55:03,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:55:03,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:03,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2022-02-11 00:55:03,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:04,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:04,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977347287] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:04,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:04,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-02-11 00:55:04,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791878033] [2022-02-11 00:55:04,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:04,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:55:04,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:04,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:55:04,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:55:04,334 INFO L87 Difference]: Start difference. First operand 355 states and 735 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:05,017 INFO L93 Difference]: Finished difference Result 1107 states and 2182 transitions. [2022-02-11 00:55:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:55:05,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-02-11 00:55:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:05,019 INFO L225 Difference]: With dead ends: 1107 [2022-02-11 00:55:05,019 INFO L226 Difference]: Without dead ends: 984 [2022-02-11 00:55:05,019 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:55:05,019 INFO L934 BasicCegarLoop]: 139 mSDtfsCounter, 164 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:05,019 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 2593 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2205 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:55:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-11 00:55:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2022-02-11 00:55:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.155704697986577) internal successors, (1606), 745 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2022-02-11 00:55:05,027 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2022-02-11 00:55:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:05,027 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2022-02-11 00:55:05,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2022-02-11 00:55:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-11 00:55:05,028 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:05,028 INFO L515 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:55:05,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-11 00:55:05,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-11 00:55:05,231 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:55:05,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2069647605, now seen corresponding path program 53 times [2022-02-11 00:55:05,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:05,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900719630] [2022-02-11 00:55:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:05,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:05,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900719630] [2022-02-11 00:55:05,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900719630] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:05,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51403507] [2022-02-11 00:55:05,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:55:05,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:05,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:05,810 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) [2022-02-11 00:55:05,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 00:55:05,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-02-11 00:55:05,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:05,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:55:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:07,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:07,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51403507] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:07,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:07,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 100 [2022-02-11 00:55:07,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044899505] [2022-02-11 00:55:07,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:07,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-11 00:55:07,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:07,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-11 00:55:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=8322, Unknown=0, NotChecked=0, Total=10100 [2022-02-11 00:55:07,739 INFO L87 Difference]: Start difference. First operand 746 states and 1606 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:40,781 INFO L93 Difference]: Finished difference Result 8954 states and 17133 transitions. [2022-02-11 00:55:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2022-02-11 00:55:40,781 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-02-11 00:55:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:40,789 INFO L225 Difference]: With dead ends: 8954 [2022-02-11 00:55:40,789 INFO L226 Difference]: Without dead ends: 6521 [2022-02-11 00:55:40,810 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249266 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=129908, Invalid=402262, Unknown=0, NotChecked=0, Total=532170 [2022-02-11 00:55:40,810 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1519 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 5287 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 5608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 5287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:40,810 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 816 Invalid, 5608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 5287 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-11 00:55:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6521 states. [2022-02-11 00:55:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6521 to 445. [2022-02-11 00:55:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.063063063063063) internal successors, (916), 444 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2022-02-11 00:55:40,835 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2022-02-11 00:55:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:40,835 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2022-02-11 00:55:40,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2022-02-11 00:55:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-11 00:55:40,836 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:40,836 INFO L515 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:55:40,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:41,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:41,052 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:55:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2082802247, now seen corresponding path program 54 times [2022-02-11 00:55:41,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:41,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114723103] [2022-02-11 00:55:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:41,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:41,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114723103] [2022-02-11 00:55:41,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114723103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:41,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294882397] [2022-02-11 00:55:41,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:55:41,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:41,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:41,433 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) [2022-02-11 00:55:41,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 00:55:41,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-02-11 00:55:41,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:41,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:55:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:42,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:43,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294882397] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:43,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:43,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41, 41] total 99 [2022-02-11 00:55:43,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233811532] [2022-02-11 00:55:43,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:43,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-11 00:55:43,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-11 00:55:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2342, Invalid=7558, Unknown=0, NotChecked=0, Total=9900 [2022-02-11 00:55:43,708 INFO L87 Difference]: Start difference. First operand 445 states and 916 transitions. Second operand has 100 states, 100 states have (on average 2.45) internal successors, (245), 99 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:00,607 INFO L93 Difference]: Finished difference Result 4672 states and 9318 transitions. [2022-02-11 00:56:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2022-02-11 00:56:00,607 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.45) internal successors, (245), 99 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-02-11 00:56:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:00,612 INFO L225 Difference]: With dead ends: 4672 [2022-02-11 00:56:00,612 INFO L226 Difference]: Without dead ends: 4668 [2022-02-11 00:56:00,625 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128719 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=74651, Invalid=215331, Unknown=0, NotChecked=0, Total=289982 [2022-02-11 00:56:00,625 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1514 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:00,626 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 285 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:56:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2022-02-11 00:56:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2022-02-11 00:56:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.077956989247312) internal successors, (773), 372 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2022-02-11 00:56:00,674 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2022-02-11 00:56:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:00,674 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2022-02-11 00:56:00,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.45) internal successors, (245), 99 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2022-02-11 00:56:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-11 00:56:00,674 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:00,674 INFO L515 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:56:00,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 00:56:00,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:00,887 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:56:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1284395959, now seen corresponding path program 55 times [2022-02-11 00:56:00,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:00,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22589404] [2022-02-11 00:56:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:00,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:01,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:01,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22589404] [2022-02-11 00:56:01,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22589404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:01,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320765458] [2022-02-11 00:56:01,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:56:01,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:01,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:01,204 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) [2022-02-11 00:56:01,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 00:56:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2022-02-11 00:56:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:01,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:01,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320765458] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:01,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:01,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-02-11 00:56:01,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124042088] [2022-02-11 00:56:01,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:01,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:56:01,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:01,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:56:01,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:56:01,760 INFO L87 Difference]: Start difference. First operand 373 states and 773 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:02,494 INFO L93 Difference]: Finished difference Result 1166 states and 2299 transitions. [2022-02-11 00:56:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:56:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-02-11 00:56:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:02,496 INFO L225 Difference]: With dead ends: 1166 [2022-02-11 00:56:02,496 INFO L226 Difference]: Without dead ends: 1037 [2022-02-11 00:56:02,496 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:56:02,496 INFO L934 BasicCegarLoop]: 146 mSDtfsCounter, 173 mSDsluCounter, 3884 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2869 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:02,497 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2869 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:56:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-02-11 00:56:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2022-02-11 00:56:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.156687898089172) internal successors, (1693), 785 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2022-02-11 00:56:02,504 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2022-02-11 00:56:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:02,505 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2022-02-11 00:56:02,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2022-02-11 00:56:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-11 00:56:02,505 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:02,506 INFO L515 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:56:02,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-11 00:56:02,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:02,706 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:56:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1237898805, now seen corresponding path program 56 times [2022-02-11 00:56:02,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:02,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056829480] [2022-02-11 00:56:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:03,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:03,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056829480] [2022-02-11 00:56:03,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056829480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:03,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334943202] [2022-02-11 00:56:03,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:56:03,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:03,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:03,387 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) [2022-02-11 00:56:03,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 00:56:03,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:56:03,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:56:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:04,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:05,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334943202] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:05,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:05,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 105 [2022-02-11 00:56:05,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717901186] [2022-02-11 00:56:05,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:05,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-11 00:56:05,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:05,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-11 00:56:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=9179, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 00:56:05,498 INFO L87 Difference]: Start difference. First operand 786 states and 1693 transitions. Second operand has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:43,086 INFO L93 Difference]: Finished difference Result 9830 states and 18805 transitions. [2022-02-11 00:56:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-02-11 00:56:43,086 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-02-11 00:56:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:43,094 INFO L225 Difference]: With dead ends: 9830 [2022-02-11 00:56:43,094 INFO L226 Difference]: Without dead ends: 7145 [2022-02-11 00:56:43,121 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302503 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=155454, Invalid=480552, Unknown=0, NotChecked=0, Total=636006 [2022-02-11 00:56:43,121 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1633 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 5654 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 6007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 5654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:43,122 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 877 Invalid, 6007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 5654 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-11 00:56:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7145 states. [2022-02-11 00:56:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7145 to 467. [2022-02-11 00:56:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.0643776824034337) internal successors, (962), 466 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2022-02-11 00:56:43,147 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2022-02-11 00:56:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:43,147 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2022-02-11 00:56:43,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2022-02-11 00:56:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-11 00:56:43,148 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:43,148 INFO L515 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:56:43,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 00:56:43,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-11 00:56:43,361 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:56:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash 90081725, now seen corresponding path program 57 times [2022-02-11 00:56:43,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:43,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367618903] [2022-02-11 00:56:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:43,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:43,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:43,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367618903] [2022-02-11 00:56:43,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367618903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:43,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417020288] [2022-02-11 00:56:43,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:56:43,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:43,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:43,703 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) [2022-02-11 00:56:43,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 00:56:43,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-02-11 00:56:43,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:43,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:56:43,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:45,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:46,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417020288] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:46,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:46,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43, 43] total 104 [2022-02-11 00:56:46,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327500374] [2022-02-11 00:56:46,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:46,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-11 00:56:46,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-11 00:56:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=8345, Unknown=0, NotChecked=0, Total=10920 [2022-02-11 00:56:46,142 INFO L87 Difference]: Start difference. First operand 467 states and 962 transitions. Second operand has 105 states, 105 states have (on average 2.447619047619048) internal successors, (257), 104 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:05,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:57:05,641 INFO L93 Difference]: Finished difference Result 5136 states and 10246 transitions. [2022-02-11 00:57:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2022-02-11 00:57:05,641 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.447619047619048) internal successors, (257), 104 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-02-11 00:57:05,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:57:05,646 INFO L225 Difference]: With dead ends: 5136 [2022-02-11 00:57:05,646 INFO L226 Difference]: Without dead ends: 5132 [2022-02-11 00:57:05,661 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155067 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=88429, Invalid=255553, Unknown=0, NotChecked=0, Total=343982 [2022-02-11 00:57:05,662 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1665 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:57:05,662 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1665 Valid, 326 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 00:57:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2022-02-11 00:57:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 391. [2022-02-11 00:57:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0794871794871796) internal successors, (811), 390 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 811 transitions. [2022-02-11 00:57:05,679 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 811 transitions. Word has length 93 [2022-02-11 00:57:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:57:05,680 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 811 transitions. [2022-02-11 00:57:05,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.447619047619048) internal successors, (257), 104 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 811 transitions. [2022-02-11 00:57:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-11 00:57:05,680 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:57:05,681 INFO L515 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:57:05,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-11 00:57:05,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 00:57:05,890 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:57:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:57:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash -837716215, now seen corresponding path program 58 times [2022-02-11 00:57:05,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:57:05,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082016056] [2022-02-11 00:57:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:57:05,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:57:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:57:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:06,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:57:06,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082016056] [2022-02-11 00:57:06,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082016056] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:57:06,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059884481] [2022-02-11 00:57:06,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:57:06,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:57:06,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:57:06,214 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) [2022-02-11 00:57:06,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 00:57:06,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:57:06,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:57:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2022-02-11 00:57:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:57:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:06,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:57:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:06,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059884481] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:57:06,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:57:06,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-02-11 00:57:06,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140411193] [2022-02-11 00:57:06,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:57:06,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:57:06,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:57:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:57:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:57:06,845 INFO L87 Difference]: Start difference. First operand 391 states and 811 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:57:07,639 INFO L93 Difference]: Finished difference Result 1225 states and 2416 transitions. [2022-02-11 00:57:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:57:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-02-11 00:57:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:57:07,640 INFO L225 Difference]: With dead ends: 1225 [2022-02-11 00:57:07,640 INFO L226 Difference]: Without dead ends: 1090 [2022-02-11 00:57:07,641 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:57:07,641 INFO L934 BasicCegarLoop]: 153 mSDtfsCounter, 182 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:57:07,641 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 3159 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:57:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-02-11 00:57:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 826. [2022-02-11 00:57:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1575757575757577) internal successors, (1780), 825 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1780 transitions. [2022-02-11 00:57:07,648 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1780 transitions. Word has length 95 [2022-02-11 00:57:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:57:07,649 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1780 transitions. [2022-02-11 00:57:07,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1780 transitions. [2022-02-11 00:57:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-11 00:57:07,649 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:57:07,650 INFO L515 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:57:07,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-11 00:57:07,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:57:07,850 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:57:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:57:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash -822582389, now seen corresponding path program 59 times [2022-02-11 00:57:07,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:57:07,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884320716] [2022-02-11 00:57:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:57:07,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:57:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:57:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:08,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:57:08,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884320716] [2022-02-11 00:57:08,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884320716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:57:08,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522463669] [2022-02-11 00:57:08,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:57:08,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:57:08,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:57:08,524 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) [2022-02-11 00:57:08,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 00:57:08,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-02-11 00:57:08,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:57:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-11 00:57:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:57:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:10,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:57:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:10,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522463669] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:57:10,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:57:10,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 110 [2022-02-11 00:57:10,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765148609] [2022-02-11 00:57:10,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:57:10,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-11 00:57:10,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:57:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-11 00:57:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2132, Invalid=10078, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 00:57:10,795 INFO L87 Difference]: Start difference. First operand 826 states and 1780 transitions. Second operand has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:57:55,008 INFO L93 Difference]: Finished difference Result 10746 states and 20553 transitions. [2022-02-11 00:57:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 762 states. [2022-02-11 00:57:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-02-11 00:57:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:57:55,017 INFO L225 Difference]: With dead ends: 10746 [2022-02-11 00:57:55,018 INFO L226 Difference]: Without dead ends: 7797 [2022-02-11 00:57:55,047 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 867 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363898 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=184600, Invalid=569692, Unknown=0, NotChecked=0, Total=754292 [2022-02-11 00:57:55,048 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1970 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 6493 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 6923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 6493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:57:55,048 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1970 Valid, 972 Invalid, 6923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 6493 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-11 00:57:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2022-02-11 00:57:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 489. [2022-02-11 00:57:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0655737704918034) internal successors, (1008), 488 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1008 transitions. [2022-02-11 00:57:55,078 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1008 transitions. Word has length 97 [2022-02-11 00:57:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:57:55,078 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1008 transitions. [2022-02-11 00:57:55,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1008 transitions. [2022-02-11 00:57:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-11 00:57:55,079 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:57:55,079 INFO L515 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:57:55,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-11 00:57:55,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:57:55,296 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:57:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:57:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash 846109633, now seen corresponding path program 60 times [2022-02-11 00:57:55,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:57:55,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277489220] [2022-02-11 00:57:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:57:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:57:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:57:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:55,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:57:55,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277489220] [2022-02-11 00:57:55,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277489220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:57:55,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665524668] [2022-02-11 00:57:55,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:57:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:57:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:57:55,657 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) [2022-02-11 00:57:55,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 00:57:55,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-02-11 00:57:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:57:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-11 00:57:55,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:57:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:57,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:57:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:58,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665524668] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:57:58,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:57:58,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45, 45] total 109 [2022-02-11 00:57:58,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493292751] [2022-02-11 00:57:58,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:57:58,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-11 00:57:58,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:57:58,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-11 00:57:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2819, Invalid=9171, Unknown=0, NotChecked=0, Total=11990 [2022-02-11 00:57:58,252 INFO L87 Difference]: Start difference. First operand 489 states and 1008 transitions. Second operand has 110 states, 110 states have (on average 2.4454545454545453) internal successors, (269), 109 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:58:20,501 INFO L93 Difference]: Finished difference Result 5622 states and 11218 transitions. [2022-02-11 00:58:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 531 states. [2022-02-11 00:58:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.4454545454545453) internal successors, (269), 109 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-02-11 00:58:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:58:20,507 INFO L225 Difference]: With dead ends: 5622 [2022-02-11 00:58:20,507 INFO L226 Difference]: Without dead ends: 5618 [2022-02-11 00:58:20,521 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 635 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185287 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=104018, Invalid=301114, Unknown=0, NotChecked=0, Total=405132 [2022-02-11 00:58:20,521 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1712 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 3422 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 3844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 3422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:58:20,522 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 334 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 3422 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 00:58:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2022-02-11 00:58:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 409. [2022-02-11 00:58:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0808823529411766) internal successors, (849), 408 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 849 transitions. [2022-02-11 00:58:20,539 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 849 transitions. Word has length 97 [2022-02-11 00:58:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:58:20,539 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 849 transitions. [2022-02-11 00:58:20,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.4454545454545453) internal successors, (269), 109 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 849 transitions. [2022-02-11 00:58:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-11 00:58:20,540 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:58:20,540 INFO L515 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:58:20,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-11 00:58:20,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:58:20,743 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:58:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:58:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1150598967, now seen corresponding path program 61 times [2022-02-11 00:58:20,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:58:20,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477807459] [2022-02-11 00:58:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:58:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:58:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:58:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:21,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:58:21,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477807459] [2022-02-11 00:58:21,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477807459] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:58:21,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941399567] [2022-02-11 00:58:21,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:58:21,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:58:21,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:58:21,098 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) [2022-02-11 00:58:21,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 00:58:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:58:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 87 conjunts are in the unsatisfiable core [2022-02-11 00:58:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:58:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:21,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:58:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:21,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941399567] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:58:21,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:58:21,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-02-11 00:58:21,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889591218] [2022-02-11 00:58:21,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:58:21,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:58:21,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:58:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:58:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:58:21,709 INFO L87 Difference]: Start difference. First operand 409 states and 849 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:58:22,578 INFO L93 Difference]: Finished difference Result 1284 states and 2533 transitions. [2022-02-11 00:58:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:58:22,579 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-02-11 00:58:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:58:22,580 INFO L225 Difference]: With dead ends: 1284 [2022-02-11 00:58:22,580 INFO L226 Difference]: Without dead ends: 1143 [2022-02-11 00:58:22,581 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 216 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:58:22,581 INFO L934 BasicCegarLoop]: 160 mSDtfsCounter, 191 mSDsluCounter, 4712 mSDsCounter, 0 mSdLazyCounter, 2949 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3463 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:58:22,581 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 3463 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:58:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-02-11 00:58:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 866. [2022-02-11 00:58:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.1583815028901734) internal successors, (1867), 865 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1867 transitions. [2022-02-11 00:58:22,589 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1867 transitions. Word has length 99 [2022-02-11 00:58:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:58:22,589 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1867 transitions. [2022-02-11 00:58:22,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1867 transitions. [2022-02-11 00:58:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-11 00:58:22,590 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:58:22,590 INFO L515 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:58:22,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-11 00:58:22,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:58:22,791 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:58:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:58:22,791 INFO L85 PathProgramCache]: Analyzing trace with hash -568058805, now seen corresponding path program 62 times [2022-02-11 00:58:22,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:58:22,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426439473] [2022-02-11 00:58:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:58:22,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:58:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:58:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:23,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:58:23,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426439473] [2022-02-11 00:58:23,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426439473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:58:23,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836903093] [2022-02-11 00:58:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:58:23,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:58:23,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:58:23,475 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) [2022-02-11 00:58:23,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 00:58:23,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:58:23,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:58:23,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:58:23,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:58:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:25,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:58:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:25,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836903093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:58:25,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:58:25,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 115 [2022-02-11 00:58:25,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165604837] [2022-02-11 00:58:25,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:58:25,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-11 00:58:25,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:58:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-11 00:58:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2321, Invalid=11019, Unknown=0, NotChecked=0, Total=13340 [2022-02-11 00:58:25,842 INFO L87 Difference]: Start difference. First operand 866 states and 1867 transitions. Second operand has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:59:16,831 INFO L93 Difference]: Finished difference Result 11702 states and 22377 transitions. [2022-02-11 00:59:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 831 states. [2022-02-11 00:59:16,831 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-02-11 00:59:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:59:16,840 INFO L225 Difference]: With dead ends: 11702 [2022-02-11 00:59:16,840 INFO L226 Difference]: Without dead ends: 8477 [2022-02-11 00:59:16,876 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 941 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434245 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=217670, Invalid=670636, Unknown=0, NotChecked=0, Total=888306 [2022-02-11 00:59:16,876 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 1848 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 6491 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1848 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 6850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 6491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:59:16,876 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1848 Valid, 991 Invalid, 6850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 6491 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-11 00:59:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2022-02-11 00:59:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 511. [2022-02-11 00:59:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.066666666666667) internal successors, (1054), 510 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1054 transitions. [2022-02-11 00:59:16,905 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1054 transitions. Word has length 101 [2022-02-11 00:59:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:59:16,905 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1054 transitions. [2022-02-11 00:59:16,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1054 transitions. [2022-02-11 00:59:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-11 00:59:16,906 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:59:16,906 INFO L515 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:59:16,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-11 00:59:17,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 00:59:17,115 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:59:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:59:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2106862533, now seen corresponding path program 63 times [2022-02-11 00:59:17,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:59:17,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327896485] [2022-02-11 00:59:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:59:17,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:59:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:59:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:17,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:59:17,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327896485] [2022-02-11 00:59:17,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327896485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:59:17,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796390530] [2022-02-11 00:59:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:59:17,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:59:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:59:17,557 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) [2022-02-11 00:59:17,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 00:59:17,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-02-11 00:59:17,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:59:17,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:59:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:59:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:19,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:59:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:20,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796390530] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:59:20,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:59:20,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47, 47] total 114 [2022-02-11 00:59:20,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134507204] [2022-02-11 00:59:20,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:59:20,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-11 00:59:20,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:59:20,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-11 00:59:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3074, Invalid=10036, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 00:59:20,337 INFO L87 Difference]: Start difference. First operand 511 states and 1054 transitions. Second operand has 115 states, 115 states have (on average 2.4434782608695653) internal successors, (281), 114 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:59:45,824 INFO L93 Difference]: Finished difference Result 6130 states and 12234 transitions. [2022-02-11 00:59:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 578 states. [2022-02-11 00:59:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.4434782608695653) internal successors, (281), 114 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-02-11 00:59:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:59:45,830 INFO L225 Difference]: With dead ends: 6130 [2022-02-11 00:59:45,830 INFO L226 Difference]: Without dead ends: 6126 [2022-02-11 00:59:45,844 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219743 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=121569, Invalid=352463, Unknown=0, NotChecked=0, Total=474032 [2022-02-11 00:59:45,844 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 2114 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2114 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 4327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:59:45,845 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [2114 Valid, 344 Invalid, 4327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-11 00:59:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2022-02-11 00:59:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 427. [2022-02-11 00:59:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.0821596244131455) internal successors, (887), 426 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 887 transitions. [2022-02-11 00:59:45,863 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 887 transitions. Word has length 101 [2022-02-11 00:59:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:59:45,863 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 887 transitions. [2022-02-11 00:59:45,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.4434782608695653) internal successors, (281), 114 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 887 transitions. [2022-02-11 00:59:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-11 00:59:45,864 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:59:45,864 INFO L515 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:59:45,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-11 00:59:46,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:59:46,064 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:59:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:59:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1366570615, now seen corresponding path program 64 times [2022-02-11 00:59:46,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:59:46,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156884210] [2022-02-11 00:59:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:59:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:59:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:59:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:46,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:59:46,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156884210] [2022-02-11 00:59:46,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156884210] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:59:46,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939556766] [2022-02-11 00:59:46,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:59:46,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:59:46,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:59:46,405 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) [2022-02-11 00:59:46,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 00:59:46,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:59:46,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:59:46,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2022-02-11 00:59:46,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:59:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:46,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:59:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:47,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939556766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:59:47,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:59:47,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2022-02-11 00:59:47,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118296825] [2022-02-11 00:59:47,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:59:47,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:59:47,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:59:47,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:59:47,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:59:47,031 INFO L87 Difference]: Start difference. First operand 427 states and 887 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:59:47,967 INFO L93 Difference]: Finished difference Result 1343 states and 2650 transitions. [2022-02-11 00:59:47,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:59:47,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-02-11 00:59:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:59:47,969 INFO L225 Difference]: With dead ends: 1343 [2022-02-11 00:59:47,969 INFO L226 Difference]: Without dead ends: 1196 [2022-02-11 00:59:47,969 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:59:47,969 INFO L934 BasicCegarLoop]: 167 mSDtfsCounter, 200 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 3221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 3222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:59:47,969 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 3781 Invalid, 3222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3221 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:59:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-02-11 00:59:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 906. [2022-02-11 00:59:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.1591160220994476) internal successors, (1954), 905 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1954 transitions. [2022-02-11 00:59:47,978 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1954 transitions. Word has length 103 [2022-02-11 00:59:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:59:47,978 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1954 transitions. [2022-02-11 00:59:47,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1954 transitions. [2022-02-11 00:59:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-11 00:59:47,979 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:59:47,979 INFO L515 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:59:47,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-11 00:59:48,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-11 00:59:48,179 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:59:48,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:59:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -897117173, now seen corresponding path program 65 times [2022-02-11 00:59:48,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:59:48,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38701198] [2022-02-11 00:59:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:59:48,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:59:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:59:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:48,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:59:48,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38701198] [2022-02-11 00:59:48,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38701198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:59:48,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457680858] [2022-02-11 00:59:48,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:59:48,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:59:48,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:59:48,910 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) [2022-02-11 00:59:48,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 00:59:48,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-02-11 00:59:48,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:59:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:59:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:59:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:50,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:59:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:51,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457680858] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:59:51,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:59:51,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 120 [2022-02-11 00:59:51,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238741115] [2022-02-11 00:59:51,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:59:51,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-11 00:59:51,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:59:51,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-11 00:59:51,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2518, Invalid=12002, Unknown=0, NotChecked=0, Total=14520 [2022-02-11 00:59:51,448 INFO L87 Difference]: Start difference. First operand 906 states and 1954 transitions. Second operand has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:00:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:00:52,430 INFO L93 Difference]: Finished difference Result 12698 states and 24277 transitions. [2022-02-11 01:00:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 903 states. [2022-02-11 01:00:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-02-11 01:00:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:00:52,442 INFO L225 Difference]: With dead ends: 12698 [2022-02-11 01:00:52,442 INFO L226 Difference]: Without dead ends: 9185 [2022-02-11 01:00:52,483 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 1018 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514384 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=255002, Invalid=784378, Unknown=0, NotChecked=0, Total=1039380 [2022-02-11 01:00:52,484 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 2287 mSDsluCounter, 2471 mSDsCounter, 0 mSdLazyCounter, 6983 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 7417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 6983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:00:52,484 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 1045 Invalid, 7417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 6983 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-11 01:00:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9185 states. [2022-02-11 01:00:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9185 to 533. [2022-02-11 01:00:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.0676691729323307) internal successors, (1100), 532 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:00:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1100 transitions. [2022-02-11 01:00:52,518 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1100 transitions. Word has length 105 [2022-02-11 01:00:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:00:52,518 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 1100 transitions. [2022-02-11 01:00:52,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:00:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1100 transitions. [2022-02-11 01:00:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-11 01:00:52,519 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:00:52,519 INFO L515 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:00:52,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 01:00:52,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-11 01:00:52,720 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:00:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:00:52,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1898432055, now seen corresponding path program 66 times [2022-02-11 01:00:52,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:00:52,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747820885] [2022-02-11 01:00:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:00:52,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:00:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:00:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:00:53,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:00:53,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747820885] [2022-02-11 01:00:53,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747820885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:00:53,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592915127] [2022-02-11 01:00:53,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:00:53,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:00:53,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:00:53,122 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) [2022-02-11 01:00:53,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 01:00:53,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-02-11 01:00:53,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:00:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 01:00:53,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:00:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:00:54,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:00:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:00:56,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592915127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:00:56,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:00:56,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49, 49] total 119 [2022-02-11 01:00:56,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243252507] [2022-02-11 01:00:56,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:00:56,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-11 01:00:56,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:00:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-11 01:00:56,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3340, Invalid=10940, Unknown=0, NotChecked=0, Total=14280 [2022-02-11 01:00:56,130 INFO L87 Difference]: Start difference. First operand 533 states and 1100 transitions. Second operand has 120 states, 120 states have (on average 2.441666666666667) internal successors, (293), 119 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:01:26,029 INFO L93 Difference]: Finished difference Result 6660 states and 13294 transitions. [2022-02-11 01:01:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 627 states. [2022-02-11 01:01:26,030 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.441666666666667) internal successors, (293), 119 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-02-11 01:01:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:01:26,036 INFO L225 Difference]: With dead ends: 6660 [2022-02-11 01:01:26,037 INFO L226 Difference]: Without dead ends: 6656 [2022-02-11 01:01:26,059 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 741 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258816 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=141239, Invalid=410067, Unknown=0, NotChecked=0, Total=551306 [2022-02-11 01:01:26,059 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 1992 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 4250 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 4250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:01:26,059 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 394 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 4250 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-11 01:01:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2022-02-11 01:01:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 445. [2022-02-11 01:01:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.0833333333333335) internal successors, (925), 444 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 925 transitions. [2022-02-11 01:01:26,133 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 925 transitions. Word has length 105 [2022-02-11 01:01:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:01:26,133 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 925 transitions. [2022-02-11 01:01:26,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.441666666666667) internal successors, (293), 119 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 925 transitions. [2022-02-11 01:01:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-11 01:01:26,134 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:01:26,134 INFO L515 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:01:26,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-11 01:01:26,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-11 01:01:26,335 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:01:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:01:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash 235917641, now seen corresponding path program 67 times [2022-02-11 01:01:26,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:01:26,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664839324] [2022-02-11 01:01:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:01:26,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:01:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:01:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:26,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:01:26,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664839324] [2022-02-11 01:01:26,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664839324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:01:26,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107929140] [2022-02-11 01:01:26,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:01:26,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:01:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:01:26,713 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) [2022-02-11 01:01:26,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 01:01:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:01:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 95 conjunts are in the unsatisfiable core [2022-02-11 01:01:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:01:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:27,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:01:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:27,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107929140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:01:27,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:01:27,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 26 [2022-02-11 01:01:27,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280747899] [2022-02-11 01:01:27,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:01:27,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:01:27,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:01:27,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:01:27,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:01:27,390 INFO L87 Difference]: Start difference. First operand 445 states and 925 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:01:28,467 INFO L93 Difference]: Finished difference Result 1402 states and 2767 transitions. [2022-02-11 01:01:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 01:01:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-02-11 01:01:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:01:28,468 INFO L225 Difference]: With dead ends: 1402 [2022-02-11 01:01:28,468 INFO L226 Difference]: Without dead ends: 1249 [2022-02-11 01:01:28,469 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 234 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:01:28,469 INFO L934 BasicCegarLoop]: 174 mSDtfsCounter, 209 mSDsluCounter, 5620 mSDsCounter, 0 mSdLazyCounter, 3505 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 4113 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:01:28,469 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 4113 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3505 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:01:28,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-02-11 01:01:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 946. [2022-02-11 01:01:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.15978835978836) internal successors, (2041), 945 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2041 transitions. [2022-02-11 01:01:28,477 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2041 transitions. Word has length 107 [2022-02-11 01:01:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:01:28,477 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 2041 transitions. [2022-02-11 01:01:28,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2041 transitions. [2022-02-11 01:01:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-11 01:01:28,479 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:01:28,479 INFO L515 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:01:28,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 01:01:28,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 01:01:28,679 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:01:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:01:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -830600501, now seen corresponding path program 68 times [2022-02-11 01:01:28,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:01:28,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766284058] [2022-02-11 01:01:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:01:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:01:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:01:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:29,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:01:29,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766284058] [2022-02-11 01:01:29,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766284058] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:01:29,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270412717] [2022-02-11 01:01:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:01:29,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:01:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:01:29,521 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) [2022-02-11 01:01:29,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 01:01:29,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:01:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:01:29,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-11 01:01:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:01:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:31,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:01:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:32,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270412717] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:01:32,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:01:32,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 125 [2022-02-11 01:01:32,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123838304] [2022-02-11 01:01:32,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:01:32,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-11 01:01:32,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:01:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-11 01:01:32,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2723, Invalid=13027, Unknown=0, NotChecked=0, Total=15750 [2022-02-11 01:01:32,333 INFO L87 Difference]: Start difference. First operand 946 states and 2041 transitions. Second operand has 126 states, 126 states have (on average 2.1031746031746033) internal successors, (265), 125 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-11 01:02:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 934 states. [2022-02-11 01:02:38,681 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 01:02:38,681 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 01:02:38,701 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 1054 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561893 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=282919, Invalid=831161, Unknown=0, NotChecked=0, Total=1114080 [2022-02-11 01:02:38,701 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 2388 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 7132 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2388 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 7661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 7132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:02:38,701 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [2388 Valid, 1081 Invalid, 7661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 7132 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-11 01:02:38,702 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-11 01:02:38,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-11 01:02:38,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:02:38,904 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (946states) and FLOYD_HOARE automaton (currently 934 states, 126 states before enhancement),while ReachableStatesComputation was computing reachable states (12440 states constructed, input type IntersectNwa). [2022-02-11 01:02:38,905 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-11 01:02:38,905 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-11 01:02:38,907 INFO L733 BasicCegarLoop]: Path program histogram: [68, 2, 1] [2022-02-11 01:02:38,909 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 01:02:38,909 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 01:02:38,910 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:02:38 BasicIcfg [2022-02-11 01:02:38,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 01:02:38,910 INFO L158 Benchmark]: Toolchain (without parser) took 748016.40ms. Allocated memory was 185.6MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 150.0MB in the beginning and 703.9MB in the end (delta: -553.9MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-02-11 01:02:38,910 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 185.6MB. Free memory is still 151.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:02:38,910 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.60ms. Allocated memory is still 185.6MB. Free memory was 149.9MB in the beginning and 148.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:02:38,910 INFO L158 Benchmark]: Boogie Preprocessor took 15.22ms. Allocated memory is still 185.6MB. Free memory was 148.4MB in the beginning and 147.5MB in the end (delta: 898.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:02:38,910 INFO L158 Benchmark]: RCFGBuilder took 177.41ms. Allocated memory is still 185.6MB. Free memory was 147.5MB in the beginning and 138.5MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-11 01:02:38,910 INFO L158 Benchmark]: TraceAbstraction took 747795.35ms. Allocated memory was 185.6MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 138.1MB in the beginning and 703.9MB in the end (delta: -565.9MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-02-11 01:02:38,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14ms. Allocated memory is still 185.6MB. Free memory is still 151.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.60ms. Allocated memory is still 185.6MB. Free memory was 149.9MB in the beginning and 148.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.22ms. Allocated memory is still 185.6MB. Free memory was 148.4MB in the beginning and 147.5MB in the end (delta: 898.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 177.41ms. Allocated memory is still 185.6MB. Free memory was 147.5MB in the beginning and 138.5MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 747795.35ms. Allocated memory was 185.6MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 138.1MB in the beginning and 703.9MB in the end (delta: -565.9MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (946states) and FLOYD_HOARE automaton (currently 934 states, 126 states before enhancement),while ReachableStatesComputation was computing reachable states (12440 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (946states) and FLOYD_HOARE automaton (currently 934 states, 126 states before enhancement),while ReachableStatesComputation was computing reachable states (12440 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (946states) and FLOYD_HOARE automaton (currently 934 states, 126 states before enhancement),while ReachableStatesComputation was computing reachable states (12440 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 747.7s, OverallIterations: 71, TraceHistogramMax: 24, PathProgramHistogramMax: 68, EmptinessCheckTime: 0.1s, AutomataDifference: 645.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 50024 SdHoareTripleChecker+Valid, 65.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50024 mSDsluCounter, 51604 SdHoareTripleChecker+Invalid, 54.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 83596 mSDsCounter, 11502 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 143775 IncrementalHoareTripleChecker+Invalid, 155277 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11502 mSolverCounterUnsat, 2737 mSDtfsCounter, 143775 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24669 GetRequests, 7041 SyntacticMatches, 115 SemanticMatches, 17513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4744335 ImplicationChecksByTransitivity, 489.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=946occurred in iteration=70, InterpolantAutomatonStates: 13772, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 70 MinimizatonAttempts, 130948 StatesRemovedByMinimization, 70 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 84.1s InterpolantComputationTime, 8726 NumberOfCodeBlocks, 8726 NumberOfCodeBlocksAsserted, 613 NumberOfCheckSat, 12864 ConstructedInterpolants, 0 QuantifiedInterpolants, 113767 SizeOfPredicates, 345 NumberOfNonLiveVariables, 11086 ConjunctsInSsa, 2461 ConjunctsInUnsatCore, 209 InterpolantComputations, 3 PerfectInterpolantSequences, 26012/77971 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown