/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/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:03:02,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:03:02,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:03:03,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:03:03,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 00:03:03,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 00:03:03,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 00:03:03,094 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 00:03:03,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:03:03,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:03:03,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:03:03,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:03:03,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:03:03,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:03:03,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:03:03,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:03:03,130 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:03:03,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:03:03,131 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:03:03,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:03:03,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:03:03,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:03:03,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:03:03,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:03:03,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:03:03,131 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:03:03,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:03:03,132 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:03:03,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:03:03,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:03:03,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:03:03,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:03:03,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:03:03,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:03:03,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:03:03,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:03:03,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:03:03,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:03:03,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:03:03,134 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:03:03,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:03:03,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:03:03,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:03:03,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:03:03,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:03:03,374 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:03:03,375 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:03:03,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2022-02-11 00:03:03,376 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2022-02-11 00:03:03,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:03:03,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:03:03,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:03:03,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:03:03,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:03:03,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,420 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:03:03,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:03:03,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:03:03,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:03:03,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:03:03,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:03:03,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:03:03,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:03:03,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:03:03,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/1) ... [2022-02-11 00:03:03,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:03:03,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:03,466 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 00:03:03,481 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 00:03:03,525 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:03:03,525 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:03:03,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:03:03,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:03:03,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:03:03,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:03:03,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:03:03,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:03:03,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:03:03,527 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 00:03:03,568 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:03:03,570 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:03:03,714 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:03:03,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:03:03,719 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 00:03:03,720 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:03:03 BoogieIcfgContainer [2022-02-11 00:03:03,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:03:03,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:03:03,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:03:03,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:03:03,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:03:03" (1/2) ... [2022-02-11 00:03:03,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1611fd7 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:03:03, skipping insertion in model container [2022-02-11 00:03:03,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:03:03" (2/2) ... [2022-02-11 00:03:03,731 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2022-02-11 00:03:03,734 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:03:03,735 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:03:03,735 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:03:03,735 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:03:03,773 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-11 00:03:03,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:03:03,809 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 00:03:03,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-11 00:03:03,815 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2022-02-11 00:03:03,831 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-11 00:03:03,838 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:03,838 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:03,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1644387332, now seen corresponding path program 1 times [2022-02-11 00:03:03,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:03,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636800816] [2022-02-11 00:03:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:03,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:03,962 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 00:03:03,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:03,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636800816] [2022-02-11 00:03:03,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636800816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:03:03,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:03:03,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-11 00:03:03,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227799419] [2022-02-11 00:03:03,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:03:03,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 00:03:03,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:03,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 00:03:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:03:03,989 INFO L87 Difference]: Start difference. First operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 00:03:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:04,014 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2022-02-11 00:03:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 00:03:04,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-11 00:03:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:04,022 INFO L225 Difference]: With dead ends: 99 [2022-02-11 00:03:04,023 INFO L226 Difference]: Without dead ends: 92 [2022-02-11 00:03:04,024 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 00:03:04,026 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:04,027 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-11 00:03:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-02-11 00:03:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2022-02-11 00:03:04,095 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2022-02-11 00:03:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:04,096 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2022-02-11 00:03:04,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 00:03:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2022-02-11 00:03:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:03:04,097 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:04,097 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:04,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:03:04,098 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 27040755, now seen corresponding path program 1 times [2022-02-11 00:03:04,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:04,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249172452] [2022-02-11 00:03:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:04,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:04,189 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 00:03:04,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:04,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249172452] [2022-02-11 00:03:04,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249172452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:04,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120291239] [2022-02-11 00:03:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:04,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:04,192 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 00:03:04,193 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 00:03:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-11 00:03:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:04,293 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 00:03:04,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:04,336 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 00:03:04,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120291239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:04,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:04,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-02-11 00:03:04,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539966423] [2022-02-11 00:03:04,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:04,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:03:04,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:03:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:03:04,339 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:04,420 INFO L93 Difference]: Finished difference Result 189 states and 379 transitions. [2022-02-11 00:03:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:03:04,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:03:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:04,422 INFO L225 Difference]: With dead ends: 189 [2022-02-11 00:03:04,422 INFO L226 Difference]: Without dead ends: 189 [2022-02-11 00:03:04,423 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:03:04,424 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:04,424 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 59 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:04,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-11 00:03:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 101. [2022-02-11 00:03:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 213 transitions. [2022-02-11 00:03:04,437 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 213 transitions. Word has length 15 [2022-02-11 00:03:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:04,437 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 213 transitions. [2022-02-11 00:03:04,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 213 transitions. [2022-02-11 00:03:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:03:04,439 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:04,439 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:04,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 00:03:04,657 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 00:03:04,657 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:04,658 INFO L85 PathProgramCache]: Analyzing trace with hash 704095387, now seen corresponding path program 2 times [2022-02-11 00:03:04,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:04,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137983907] [2022-02-11 00:03:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:04,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:04,701 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 00:03:04,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:04,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137983907] [2022-02-11 00:03:04,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137983907] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:03:04,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:03:04,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:03:04,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361729537] [2022-02-11 00:03:04,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:03:04,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:03:04,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:03:04,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:03:04,709 INFO L87 Difference]: Start difference. First operand 101 states and 213 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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 00:03:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:04,759 INFO L93 Difference]: Finished difference Result 120 states and 245 transitions. [2022-02-11 00:03:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:03:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 00:03:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:04,760 INFO L225 Difference]: With dead ends: 120 [2022-02-11 00:03:04,760 INFO L226 Difference]: Without dead ends: 113 [2022-02-11 00:03:04,761 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:03:04,761 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:04,762 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-11 00:03:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2022-02-11 00:03:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 00:03:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2022-02-11 00:03:04,778 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2022-02-11 00:03:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:04,778 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2022-02-11 00:03:04,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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 00:03:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2022-02-11 00:03:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:03:04,779 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:04,779 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 00:03:04,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 00:03:04,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash -583322209, now seen corresponding path program 1 times [2022-02-11 00:03:04,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:04,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363108977] [2022-02-11 00:03:04,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:05,002 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 00:03:05,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:05,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363108977] [2022-02-11 00:03:05,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363108977] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:05,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741389654] [2022-02-11 00:03:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:05,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:05,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:05,020 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 00:03:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-11 00:03:05,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:05,079 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 00:03:05,244 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 00:03:05,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:05,401 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 00:03:05,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741389654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:05,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:05,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-02-11 00:03:05,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520981418] [2022-02-11 00:03:05,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:05,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:03:05,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:03:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:03:05,411 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:05,731 INFO L93 Difference]: Finished difference Result 372 states and 784 transitions. [2022-02-11 00:03:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:03:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 00:03:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:05,733 INFO L225 Difference]: With dead ends: 372 [2022-02-11 00:03:05,733 INFO L226 Difference]: Without dead ends: 328 [2022-02-11 00:03:05,734 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:03:05,734 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 173 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:05,734 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 202 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:03:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-11 00:03:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 162. [2022-02-11 00:03:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.3229813664596275) internal successors, (374), 161 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 00:03:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 374 transitions. [2022-02-11 00:03:05,770 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 374 transitions. Word has length 19 [2022-02-11 00:03:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:05,771 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 374 transitions. [2022-02-11 00:03:05,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 374 transitions. [2022-02-11 00:03:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:03:05,779 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:05,780 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 00:03:05,819 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 00:03:05,980 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 00:03:05,981 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:05,981 INFO L85 PathProgramCache]: Analyzing trace with hash 304723312, now seen corresponding path program 1 times [2022-02-11 00:03:05,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:05,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109787787] [2022-02-11 00:03:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:05,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:06,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:06,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109787787] [2022-02-11 00:03:06,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109787787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:03:06,030 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:03:06,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:03:06,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907251820] [2022-02-11 00:03:06,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:03:06,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:03:06,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:03:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:03:06,032 INFO L87 Difference]: Start difference. First operand 162 states and 374 transitions. Second operand has 5 states, 5 states have (on average 3.8) 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 00:03:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:06,058 INFO L93 Difference]: Finished difference Result 187 states and 429 transitions. [2022-02-11 00:03:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:03:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) 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 00:03:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:06,060 INFO L225 Difference]: With dead ends: 187 [2022-02-11 00:03:06,060 INFO L226 Difference]: Without dead ends: 187 [2022-02-11 00:03:06,060 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:03:06,062 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:06,065 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-11 00:03:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 162. [2022-02-11 00:03:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.329192546583851) internal successors, (375), 161 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 00:03:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 375 transitions. [2022-02-11 00:03:06,079 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 375 transitions. Word has length 19 [2022-02-11 00:03:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:06,080 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 375 transitions. [2022-02-11 00:03:06,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) 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 00:03:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 375 transitions. [2022-02-11 00:03:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:03:06,081 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:06,081 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:06,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 00:03:06,081 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:06,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:06,081 INFO L85 PathProgramCache]: Analyzing trace with hash -560508981, now seen corresponding path program 1 times [2022-02-11 00:03:06,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:06,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537638191] [2022-02-11 00:03:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:06,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:06,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:06,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537638191] [2022-02-11 00:03:06,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537638191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:06,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640851590] [2022-02-11 00:03:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:06,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:06,282 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 00:03:06,283 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 00:03:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-11 00:03:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:06,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:06,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640851590] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:06,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:06,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-02-11 00:03:06,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811681853] [2022-02-11 00:03:06,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:06,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:03:06,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:06,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:03:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:03:06,682 INFO L87 Difference]: Start difference. First operand 162 states and 375 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 00:03:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:07,572 INFO L93 Difference]: Finished difference Result 689 states and 1490 transitions. [2022-02-11 00:03:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:03:07,572 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 22 [2022-02-11 00:03:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:07,575 INFO L225 Difference]: With dead ends: 689 [2022-02-11 00:03:07,575 INFO L226 Difference]: Without dead ends: 675 [2022-02-11 00:03:07,576 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:03:07,576 INFO L934 BasicCegarLoop]: 68 mSDtfsCounter, 295 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:07,577 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 592 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:03:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-02-11 00:03:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 352. [2022-02-11 00:03:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.393162393162393) internal successors, (840), 351 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 00:03:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 840 transitions. [2022-02-11 00:03:07,592 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 840 transitions. Word has length 22 [2022-02-11 00:03:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:07,592 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 840 transitions. [2022-02-11 00:03:07,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 00:03:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 840 transitions. [2022-02-11 00:03:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:03:07,593 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:07,593 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:07,626 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 00:03:07,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:07,826 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:07,827 INFO L85 PathProgramCache]: Analyzing trace with hash 700260299, now seen corresponding path program 2 times [2022-02-11 00:03:07,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:07,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134244815] [2022-02-11 00:03:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:07,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:07,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:07,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134244815] [2022-02-11 00:03:07,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134244815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:07,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274249046] [2022-02-11 00:03:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:03:07,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:07,980 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 00:03:07,981 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 00:03:08,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:03:08,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:08,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-11 00:03:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:08,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:08,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274249046] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:08,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:08,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-02-11 00:03:08,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729051117] [2022-02-11 00:03:08,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:08,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:03:08,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:08,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:03:08,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:03:08,364 INFO L87 Difference]: Start difference. First operand 352 states and 840 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 00:03:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:09,172 INFO L93 Difference]: Finished difference Result 1141 states and 2511 transitions. [2022-02-11 00:03:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:03:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 22 [2022-02-11 00:03:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:09,177 INFO L225 Difference]: With dead ends: 1141 [2022-02-11 00:03:09,177 INFO L226 Difference]: Without dead ends: 1113 [2022-02-11 00:03:09,178 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:03:09,178 INFO L934 BasicCegarLoop]: 66 mSDtfsCounter, 322 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:09,179 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 498 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:03:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-02-11 00:03:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 625. [2022-02-11 00:03:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.4166666666666665) internal successors, (1508), 624 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states 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 00:03:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1508 transitions. [2022-02-11 00:03:09,196 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1508 transitions. Word has length 22 [2022-02-11 00:03:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:09,196 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1508 transitions. [2022-02-11 00:03:09,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 00:03:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1508 transitions. [2022-02-11 00:03:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:03:09,198 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:09,198 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:09,217 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 00:03:09,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:09,416 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash 380237771, now seen corresponding path program 3 times [2022-02-11 00:03:09,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:09,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032159704] [2022-02-11 00:03:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:09,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:09,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:09,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032159704] [2022-02-11 00:03:09,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032159704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:09,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141105945] [2022-02-11 00:03:09,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:03:09,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:09,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:09,552 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 00:03:09,553 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 00:03:09,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:03:09,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:09,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-11 00:03:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:09,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:09,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141105945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:09,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:09,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-02-11 00:03:09,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096547127] [2022-02-11 00:03:09,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:09,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:03:09,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:09,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:03:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:03:09,897 INFO L87 Difference]: Start difference. First operand 625 states and 1508 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 00:03:10,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:10,380 INFO L93 Difference]: Finished difference Result 1215 states and 2790 transitions. [2022-02-11 00:03:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:03:10,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 22 [2022-02-11 00:03:10,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:10,384 INFO L225 Difference]: With dead ends: 1215 [2022-02-11 00:03:10,384 INFO L226 Difference]: Without dead ends: 1194 [2022-02-11 00:03:10,385 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:03:10,385 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 189 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:10,386 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 560 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:03:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-02-11 00:03:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 862. [2022-02-11 00:03:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.464576074332172) internal successors, (2122), 861 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states 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 00:03:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2122 transitions. [2022-02-11 00:03:10,406 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2122 transitions. Word has length 22 [2022-02-11 00:03:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:10,406 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2122 transitions. [2022-02-11 00:03:10,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 00:03:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2122 transitions. [2022-02-11 00:03:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:03:10,407 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:10,408 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:10,441 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 00:03:10,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:10,624 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1627974969, now seen corresponding path program 4 times [2022-02-11 00:03:10,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:10,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642861930] [2022-02-11 00:03:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:10,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:10,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642861930] [2022-02-11 00:03:10,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642861930] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:10,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766153426] [2022-02-11 00:03:10,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:03:10,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:10,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:10,848 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 00:03:10,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:03:10,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-11 00:03:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:10,900 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 00:03:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:11,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:11,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766153426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:11,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:11,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-02-11 00:03:11,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412009856] [2022-02-11 00:03:11,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:11,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:03:11,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:03:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:03:11,227 INFO L87 Difference]: Start difference. First operand 862 states and 2122 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 00:03:11,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:11,626 INFO L93 Difference]: Finished difference Result 1178 states and 2781 transitions. [2022-02-11 00:03:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:03:11,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 22 [2022-02-11 00:03:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:11,631 INFO L225 Difference]: With dead ends: 1178 [2022-02-11 00:03:11,631 INFO L226 Difference]: Without dead ends: 1157 [2022-02-11 00:03:11,632 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:03:11,632 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 151 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:11,632 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 517 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:03:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-02-11 00:03:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 922. [2022-02-11 00:03:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.478827361563518) internal successors, (2283), 921 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states 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 00:03:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2283 transitions. [2022-02-11 00:03:11,693 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2283 transitions. Word has length 22 [2022-02-11 00:03:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:11,693 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 2283 transitions. [2022-02-11 00:03:11,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 00:03:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2283 transitions. [2022-02-11 00:03:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:03:11,695 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:11,696 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:11,727 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 00:03:11,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:11,912 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash -361604473, now seen corresponding path program 2 times [2022-02-11 00:03:11,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:11,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147868234] [2022-02-11 00:03:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:11,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:11,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:11,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147868234] [2022-02-11 00:03:11,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147868234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:11,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384027820] [2022-02-11 00:03:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:03:11,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:11,955 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 00:03:11,956 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 00:03:11,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:03:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:11,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:03:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:12,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:12,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384027820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:12,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:12,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-11 00:03:12,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384559760] [2022-02-11 00:03:12,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:12,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:03:12,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:03:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:03:12,087 INFO L87 Difference]: Start difference. First operand 922 states and 2283 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:12,214 INFO L93 Difference]: Finished difference Result 3353 states and 8090 transitions. [2022-02-11 00:03:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:03:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:03:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:12,225 INFO L225 Difference]: With dead ends: 3353 [2022-02-11 00:03:12,225 INFO L226 Difference]: Without dead ends: 3353 [2022-02-11 00:03:12,225 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:03:12,225 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 136 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:12,226 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 192 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:03:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2022-02-11 00:03:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2738. [2022-02-11 00:03:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2737 states have (on average 2.5637559371574716) internal successors, (7017), 2737 states have internal predecessors, (7017), 0 states have call successors, (0), 0 states 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 00:03:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 7017 transitions. [2022-02-11 00:03:12,278 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 7017 transitions. Word has length 25 [2022-02-11 00:03:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:12,278 INFO L470 AbstractCegarLoop]: Abstraction has 2738 states and 7017 transitions. [2022-02-11 00:03:12,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 7017 transitions. [2022-02-11 00:03:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:03:12,281 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:12,281 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:12,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-11 00:03:12,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:12,498 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1307585132, now seen corresponding path program 5 times [2022-02-11 00:03:12,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:12,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587927048] [2022-02-11 00:03:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:12,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:12,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:12,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587927048] [2022-02-11 00:03:12,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587927048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:12,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990806909] [2022-02-11 00:03:12,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:03:12,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:12,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:12,535 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 00:03:12,550 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 00:03:12,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:03:12,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:03:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:12,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:12,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990806909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:12,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:12,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:03:12,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350859868] [2022-02-11 00:03:12,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:12,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:03:12,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:12,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:03:12,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:03:12,654 INFO L87 Difference]: Start difference. First operand 2738 states and 7017 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:12,712 INFO L93 Difference]: Finished difference Result 4288 states and 10732 transitions. [2022-02-11 00:03:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:03:12,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:03:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:12,725 INFO L225 Difference]: With dead ends: 4288 [2022-02-11 00:03:12,725 INFO L226 Difference]: Without dead ends: 4285 [2022-02-11 00:03:12,726 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:03:12,726 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:12,726 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 91 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2022-02-11 00:03:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3233. [2022-02-11 00:03:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3233 states, 3232 states have (on average 2.5693069306930694) internal successors, (8304), 3232 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states 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 00:03:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 8304 transitions. [2022-02-11 00:03:12,792 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 8304 transitions. Word has length 25 [2022-02-11 00:03:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:12,793 INFO L470 AbstractCegarLoop]: Abstraction has 3233 states and 8304 transitions. [2022-02-11 00:03:12,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 8304 transitions. [2022-02-11 00:03:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:03:12,796 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:12,796 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:12,813 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 00:03:13,012 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,SelfDestructingSolverStorable10 [2022-02-11 00:03:13,012 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1500532664, now seen corresponding path program 6 times [2022-02-11 00:03:13,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:13,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559114255] [2022-02-11 00:03:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:13,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:13,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559114255] [2022-02-11 00:03:13,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559114255] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:13,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205952393] [2022-02-11 00:03:13,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:03:13,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:13,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:13,037 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 00:03:13,065 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 00:03:13,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:03:13,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:13,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:03:13,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:13,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:13,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205952393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:13,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:13,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:03:13,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974233052] [2022-02-11 00:03:13,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:13,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:03:13,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:03:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:03:13,149 INFO L87 Difference]: Start difference. First operand 3233 states and 8304 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 00:03:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:13,215 INFO L93 Difference]: Finished difference Result 5574 states and 14046 transitions. [2022-02-11 00:03:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:03:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 00:03:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:13,233 INFO L225 Difference]: With dead ends: 5574 [2022-02-11 00:03:13,233 INFO L226 Difference]: Without dead ends: 5568 [2022-02-11 00:03:13,233 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:03:13,234 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:13,234 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 75 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2022-02-11 00:03:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 3783. [2022-02-11 00:03:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 2.581702802749868) internal successors, (9764), 3782 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states 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 00:03:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 9764 transitions. [2022-02-11 00:03:13,336 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 9764 transitions. Word has length 25 [2022-02-11 00:03:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:13,337 INFO L470 AbstractCegarLoop]: Abstraction has 3783 states and 9764 transitions. [2022-02-11 00:03:13,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 00:03:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 9764 transitions. [2022-02-11 00:03:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:03:13,343 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:13,343 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:13,360 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 00:03:13,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:13,560 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash -137039792, now seen corresponding path program 7 times [2022-02-11 00:03:13,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:13,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721841756] [2022-02-11 00:03:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:13,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:13,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:13,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721841756] [2022-02-11 00:03:13,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721841756] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:13,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898985934] [2022-02-11 00:03:13,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:03:13,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:13,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:13,591 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 00:03:13,616 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 00:03:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:03:13,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:13,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:13,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898985934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:13,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:13,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:03:13,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902339724] [2022-02-11 00:03:13,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:13,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:03:13,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:03:13,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:03:13,724 INFO L87 Difference]: Start difference. First operand 3783 states and 9764 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:13,800 INFO L93 Difference]: Finished difference Result 5553 states and 13996 transitions. [2022-02-11 00:03:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:03:13,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:03:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:13,820 INFO L225 Difference]: With dead ends: 5553 [2022-02-11 00:03:13,820 INFO L226 Difference]: Without dead ends: 5533 [2022-02-11 00:03:13,820 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:03:13,821 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:13,821 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 83 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2022-02-11 00:03:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 4298. [2022-02-11 00:03:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4297 states have (on average 2.5778450081452178) internal successors, (11077), 4297 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states 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 00:03:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 11077 transitions. [2022-02-11 00:03:13,900 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 11077 transitions. Word has length 25 [2022-02-11 00:03:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:13,901 INFO L470 AbstractCegarLoop]: Abstraction has 4298 states and 11077 transitions. [2022-02-11 00:03:13,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 11077 transitions. [2022-02-11 00:03:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:03:13,904 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:13,904 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:13,921 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 00:03:14,117 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,SelfDestructingSolverStorable12 [2022-02-11 00:03:14,117 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:14,118 INFO L85 PathProgramCache]: Analyzing trace with hash 552150559, now seen corresponding path program 8 times [2022-02-11 00:03:14,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:14,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094548515] [2022-02-11 00:03:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:14,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:14,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:14,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094548515] [2022-02-11 00:03:14,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094548515] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:14,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496407522] [2022-02-11 00:03:14,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:03:14,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:14,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:14,264 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 00:03:14,265 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 00:03:14,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:03:14,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:14,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:03:14,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:14,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:14,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496407522] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:14,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:14,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2022-02-11 00:03:14,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848963067] [2022-02-11 00:03:14,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:14,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:03:14,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:03:14,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:03:14,697 INFO L87 Difference]: Start difference. First operand 4298 states and 11077 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:15,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:15,728 INFO L93 Difference]: Finished difference Result 7346 states and 18226 transitions. [2022-02-11 00:03:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:03:15,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:03:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:15,742 INFO L225 Difference]: With dead ends: 7346 [2022-02-11 00:03:15,742 INFO L226 Difference]: Without dead ends: 7310 [2022-02-11 00:03:15,743 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:03:15,743 INFO L934 BasicCegarLoop]: 112 mSDtfsCounter, 345 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:15,743 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1074 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:03:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7310 states. [2022-02-11 00:03:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7310 to 5686. [2022-02-11 00:03:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 2.573262972735268) internal successors, (14629), 5685 states have internal predecessors, (14629), 0 states have call successors, (0), 0 states 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 00:03:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 14629 transitions. [2022-02-11 00:03:15,863 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 14629 transitions. Word has length 25 [2022-02-11 00:03:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:15,864 INFO L470 AbstractCegarLoop]: Abstraction has 5686 states and 14629 transitions. [2022-02-11 00:03:15,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 14629 transitions. [2022-02-11 00:03:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:03:15,870 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:15,870 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:15,888 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 00:03:16,083 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,SelfDestructingSolverStorable13 [2022-02-11 00:03:16,083 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:16,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1395198643, now seen corresponding path program 9 times [2022-02-11 00:03:16,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:16,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246914900] [2022-02-11 00:03:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:16,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:16,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246914900] [2022-02-11 00:03:16,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246914900] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:16,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123145259] [2022-02-11 00:03:16,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:03:16,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:16,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:16,246 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 00:03:16,258 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 00:03:16,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:03:16,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:16,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:03:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:16,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:16,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123145259] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:16,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:16,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2022-02-11 00:03:16,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760193139] [2022-02-11 00:03:16,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:16,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:03:16,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:16,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:03:16,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:03:16,645 INFO L87 Difference]: Start difference. First operand 5686 states and 14629 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:17,233 INFO L93 Difference]: Finished difference Result 7858 states and 19776 transitions. [2022-02-11 00:03:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:03:17,234 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:03:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:17,249 INFO L225 Difference]: With dead ends: 7858 [2022-02-11 00:03:17,249 INFO L226 Difference]: Without dead ends: 7822 [2022-02-11 00:03:17,251 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:03:17,251 INFO L934 BasicCegarLoop]: 85 mSDtfsCounter, 308 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:17,252 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 959 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:03:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2022-02-11 00:03:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 6908. [2022-02-11 00:03:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6908 states, 6907 states have (on average 2.578398725930216) internal successors, (17809), 6907 states have internal predecessors, (17809), 0 states have call successors, (0), 0 states 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 00:03:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 17809 transitions. [2022-02-11 00:03:17,360 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 17809 transitions. Word has length 25 [2022-02-11 00:03:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:17,360 INFO L470 AbstractCegarLoop]: Abstraction has 6908 states and 17809 transitions. [2022-02-11 00:03:17,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 17809 transitions. [2022-02-11 00:03:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:03:17,366 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:17,366 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:17,401 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 00:03:17,575 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,SelfDestructingSolverStorable14 [2022-02-11 00:03:17,575 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1207140103, now seen corresponding path program 10 times [2022-02-11 00:03:17,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:17,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003800442] [2022-02-11 00:03:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:17,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:17,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:17,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003800442] [2022-02-11 00:03:17,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003800442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:17,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472498988] [2022-02-11 00:03:17,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:03:17,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:17,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:17,740 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 00:03:17,741 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 00:03:17,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:03:17,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:17,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:03:17,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:17,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:18,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472498988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:18,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:18,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-02-11 00:03:18,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326722745] [2022-02-11 00:03:18,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:18,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:03:18,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:03:18,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:03:18,171 INFO L87 Difference]: Start difference. First operand 6908 states and 17809 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:19,741 INFO L93 Difference]: Finished difference Result 12698 states and 31660 transitions. [2022-02-11 00:03:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 00:03:19,742 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:03:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:19,771 INFO L225 Difference]: With dead ends: 12698 [2022-02-11 00:03:19,771 INFO L226 Difference]: Without dead ends: 12662 [2022-02-11 00:03:19,772 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=484, Invalid=3422, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:03:19,772 INFO L934 BasicCegarLoop]: 123 mSDtfsCounter, 323 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:19,773 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1740 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:03:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2022-02-11 00:03:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 10282. [2022-02-11 00:03:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10282 states, 10281 states have (on average 2.5722206011088415) internal successors, (26445), 10281 states have internal predecessors, (26445), 0 states have call successors, (0), 0 states 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 00:03:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10282 states to 10282 states and 26445 transitions. [2022-02-11 00:03:20,097 INFO L78 Accepts]: Start accepts. Automaton has 10282 states and 26445 transitions. Word has length 25 [2022-02-11 00:03:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:20,097 INFO L470 AbstractCegarLoop]: Abstraction has 10282 states and 26445 transitions. [2022-02-11 00:03:20,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 10282 states and 26445 transitions. [2022-02-11 00:03:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 00:03:20,121 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:20,121 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:20,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-11 00:03:20,335 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,SelfDestructingSolverStorable15 [2022-02-11 00:03:20,411 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash 563330891, now seen corresponding path program 11 times [2022-02-11 00:03:20,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:20,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438327579] [2022-02-11 00:03:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:20,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:20,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:20,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438327579] [2022-02-11 00:03:20,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438327579] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:20,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449541136] [2022-02-11 00:03:20,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:03:20,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:20,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:20,736 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 00:03:20,737 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 00:03:20,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:03:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 00:03:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:21,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:21,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449541136] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:21,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:21,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-02-11 00:03:21,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116022208] [2022-02-11 00:03:21,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:21,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:03:21,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:03:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:03:21,521 INFO L87 Difference]: Start difference. First operand 10282 states and 26445 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 00:03:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:26,953 INFO L93 Difference]: Finished difference Result 19095 states and 47762 transitions. [2022-02-11 00:03:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-11 00:03:26,953 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 28 [2022-02-11 00:03:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:26,996 INFO L225 Difference]: With dead ends: 19095 [2022-02-11 00:03:26,996 INFO L226 Difference]: Without dead ends: 19030 [2022-02-11 00:03:27,000 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2059, Invalid=15497, Unknown=0, NotChecked=0, Total=17556 [2022-02-11 00:03:27,002 INFO L934 BasicCegarLoop]: 152 mSDtfsCounter, 1016 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:27,002 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1995 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:03:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19030 states. [2022-02-11 00:03:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19030 to 16042. [2022-02-11 00:03:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16042 states, 16041 states have (on average 2.5694158718284394) internal successors, (41216), 16041 states have internal predecessors, (41216), 0 states have call successors, (0), 0 states 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 00:03:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16042 states to 16042 states and 41216 transitions. [2022-02-11 00:03:27,412 INFO L78 Accepts]: Start accepts. Automaton has 16042 states and 41216 transitions. Word has length 28 [2022-02-11 00:03:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:27,413 INFO L470 AbstractCegarLoop]: Abstraction has 16042 states and 41216 transitions. [2022-02-11 00:03:27,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 00:03:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 16042 states and 41216 transitions. [2022-02-11 00:03:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 00:03:27,439 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:27,439 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:27,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-11 00:03:27,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:27,655 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash 384948611, now seen corresponding path program 12 times [2022-02-11 00:03:27,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:27,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824661706] [2022-02-11 00:03:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:28,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:28,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824661706] [2022-02-11 00:03:28,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824661706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:28,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656909197] [2022-02-11 00:03:28,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:03:28,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:28,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:28,032 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 00:03:28,033 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 00:03:28,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:03:28,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:28,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 00:03:28,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:28,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:28,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656909197] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:28,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:28,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-02-11 00:03:28,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040302670] [2022-02-11 00:03:28,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:28,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:03:28,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:03:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:03:28,894 INFO L87 Difference]: Start difference. First operand 16042 states and 41216 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 00:03:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:33,273 INFO L93 Difference]: Finished difference Result 33116 states and 82977 transitions. [2022-02-11 00:03:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-11 00:03:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 28 [2022-02-11 00:03:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:33,468 INFO L225 Difference]: With dead ends: 33116 [2022-02-11 00:03:33,468 INFO L226 Difference]: Without dead ends: 33054 [2022-02-11 00:03:33,470 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4789 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1755, Invalid=12765, Unknown=0, NotChecked=0, Total=14520 [2022-02-11 00:03:33,471 INFO L934 BasicCegarLoop]: 163 mSDtfsCounter, 907 mSDsluCounter, 2435 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:33,471 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 2290 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:03:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33054 states. [2022-02-11 00:03:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33054 to 28120. [2022-02-11 00:03:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28120 states, 28119 states have (on average 2.5689391514634234) internal successors, (72236), 28119 states have internal predecessors, (72236), 0 states have call successors, (0), 0 states 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 00:03:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28120 states to 28120 states and 72236 transitions. [2022-02-11 00:03:34,234 INFO L78 Accepts]: Start accepts. Automaton has 28120 states and 72236 transitions. Word has length 28 [2022-02-11 00:03:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:34,234 INFO L470 AbstractCegarLoop]: Abstraction has 28120 states and 72236 transitions. [2022-02-11 00:03:34,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 00:03:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 28120 states and 72236 transitions. [2022-02-11 00:03:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 00:03:34,255 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:34,255 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:34,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-11 00:03:34,479 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,SelfDestructingSolverStorable17 [2022-02-11 00:03:34,479 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1131111861, now seen corresponding path program 13 times [2022-02-11 00:03:34,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:34,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088932043] [2022-02-11 00:03:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:34,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:34,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088932043] [2022-02-11 00:03:34,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088932043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:34,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534712403] [2022-02-11 00:03:34,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:03:34,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:34,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:34,693 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 00:03:34,694 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 00:03:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 00:03:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:35,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 00:03:35,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534712403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:35,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:35,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2022-02-11 00:03:35,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196513802] [2022-02-11 00:03:35,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:35,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:03:35,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:03:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:03:35,362 INFO L87 Difference]: Start difference. First operand 28120 states and 72236 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:37,259 INFO L93 Difference]: Finished difference Result 32737 states and 83118 transitions. [2022-02-11 00:03:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:03:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 00:03:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:37,332 INFO L225 Difference]: With dead ends: 32737 [2022-02-11 00:03:37,332 INFO L226 Difference]: Without dead ends: 32688 [2022-02-11 00:03:37,333 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=661, Invalid=5345, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 00:03:37,334 INFO L934 BasicCegarLoop]: 139 mSDtfsCounter, 442 mSDsluCounter, 2229 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:37,334 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1891 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:03:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32688 states. [2022-02-11 00:03:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32688 to 30427. [2022-02-11 00:03:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30427 states, 30426 states have (on average 2.5686583842766058) internal successors, (78154), 30426 states have internal predecessors, (78154), 0 states have call successors, (0), 0 states 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 00:03:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30427 states to 30427 states and 78154 transitions. [2022-02-11 00:03:37,954 INFO L78 Accepts]: Start accepts. Automaton has 30427 states and 78154 transitions. Word has length 28 [2022-02-11 00:03:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:37,954 INFO L470 AbstractCegarLoop]: Abstraction has 30427 states and 78154 transitions. [2022-02-11 00:03:37,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 30427 states and 78154 transitions. [2022-02-11 00:03:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 00:03:37,972 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:37,972 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:37,988 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 00:03:38,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:38,182 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1451134389, now seen corresponding path program 14 times [2022-02-11 00:03:38,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:38,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901200358] [2022-02-11 00:03:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:38,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:38,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:38,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901200358] [2022-02-11 00:03:38,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901200358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:38,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295182728] [2022-02-11 00:03:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:03:38,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:38,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:38,527 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 00:03:38,529 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 00:03:38,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:03:38,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:38,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 00:03:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:38,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 00:03:39,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295182728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:39,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:39,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2022-02-11 00:03:39,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462703482] [2022-02-11 00:03:39,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:39,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:03:39,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:39,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:03:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:03:39,122 INFO L87 Difference]: Start difference. First operand 30427 states and 78154 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:40,651 INFO L93 Difference]: Finished difference Result 34892 states and 88413 transitions. [2022-02-11 00:03:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:03:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 00:03:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:40,729 INFO L225 Difference]: With dead ends: 34892 [2022-02-11 00:03:40,729 INFO L226 Difference]: Without dead ends: 34822 [2022-02-11 00:03:40,730 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=503, Invalid=3919, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:03:40,731 INFO L934 BasicCegarLoop]: 116 mSDtfsCounter, 435 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:40,733 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1435 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:03:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34822 states. [2022-02-11 00:03:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34822 to 31263. [2022-02-11 00:03:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31263 states, 31262 states have (on average 2.5682297997568933) internal successors, (80288), 31262 states have internal predecessors, (80288), 0 states have call successors, (0), 0 states 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 00:03:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31263 states to 31263 states and 80288 transitions. [2022-02-11 00:03:41,543 INFO L78 Accepts]: Start accepts. Automaton has 31263 states and 80288 transitions. Word has length 28 [2022-02-11 00:03:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:41,543 INFO L470 AbstractCegarLoop]: Abstraction has 31263 states and 80288 transitions. [2022-02-11 00:03:41,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31263 states and 80288 transitions. [2022-02-11 00:03:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 00:03:41,567 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:41,567 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:41,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-11 00:03:41,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:41,784 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:41,784 INFO L85 PathProgramCache]: Analyzing trace with hash 835620167, now seen corresponding path program 15 times [2022-02-11 00:03:41,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:41,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180761851] [2022-02-11 00:03:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:42,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:42,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180761851] [2022-02-11 00:03:42,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180761851] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:42,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790197271] [2022-02-11 00:03:42,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:03:42,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:42,069 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 00:03:42,070 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 00:03:42,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:03:42,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:42,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 00:03:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:42,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 00:03:42,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790197271] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:42,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:42,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2022-02-11 00:03:42,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580868454] [2022-02-11 00:03:42,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:42,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:03:42,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:42,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:03:42,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:03:42,528 INFO L87 Difference]: Start difference. First operand 31263 states and 80288 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:43,580 INFO L93 Difference]: Finished difference Result 37680 states and 95652 transitions. [2022-02-11 00:03:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:03:43,580 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 00:03:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:43,671 INFO L225 Difference]: With dead ends: 37680 [2022-02-11 00:03:43,671 INFO L226 Difference]: Without dead ends: 37644 [2022-02-11 00:03:43,672 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=2532, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:03:43,673 INFO L934 BasicCegarLoop]: 100 mSDtfsCounter, 341 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:43,673 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1256 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:03:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37644 states. [2022-02-11 00:03:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37644 to 34762. [2022-02-11 00:03:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34762 states, 34761 states have (on average 2.574925922729496) internal successors, (89507), 34761 states have internal predecessors, (89507), 0 states have call successors, (0), 0 states 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 00:03:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34762 states to 34762 states and 89507 transitions. [2022-02-11 00:03:44,710 INFO L78 Accepts]: Start accepts. Automaton has 34762 states and 89507 transitions. Word has length 28 [2022-02-11 00:03:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:44,711 INFO L470 AbstractCegarLoop]: Abstraction has 34762 states and 89507 transitions. [2022-02-11 00:03:44,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34762 states and 89507 transitions. [2022-02-11 00:03:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:44,735 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:44,735 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:44,758 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 00:03:44,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:44,951 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -807763788, now seen corresponding path program 16 times [2022-02-11 00:03:44,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:44,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332313251] [2022-02-11 00:03:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:03:44,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:44,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332313251] [2022-02-11 00:03:44,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332313251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:44,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640072471] [2022-02-11 00:03:44,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:03:44,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:44,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:45,000 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 00:03:45,001 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 00:03:45,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:03:45,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:03:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:03:45,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:03:45,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640072471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:45,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:45,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2022-02-11 00:03:45,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347802632] [2022-02-11 00:03:45,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:45,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:03:45,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:03:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:03:45,100 INFO L87 Difference]: Start difference. First operand 34762 states and 89507 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:45,402 INFO L93 Difference]: Finished difference Result 26614 states and 65956 transitions. [2022-02-11 00:03:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:03:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:45,451 INFO L225 Difference]: With dead ends: 26614 [2022-02-11 00:03:45,452 INFO L226 Difference]: Without dead ends: 26614 [2022-02-11 00:03:45,453 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:03:45,454 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 106 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:45,454 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 175 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:03:45,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26614 states. [2022-02-11 00:03:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26614 to 23391. [2022-02-11 00:03:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23391 states, 23390 states have (on average 2.534972210346302) internal successors, (59293), 23390 states have internal predecessors, (59293), 0 states have call successors, (0), 0 states 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 00:03:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23391 states to 23391 states and 59293 transitions. [2022-02-11 00:03:45,895 INFO L78 Accepts]: Start accepts. Automaton has 23391 states and 59293 transitions. Word has length 29 [2022-02-11 00:03:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:45,895 INFO L470 AbstractCegarLoop]: Abstraction has 23391 states and 59293 transitions. [2022-02-11 00:03:45,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23391 states and 59293 transitions. [2022-02-11 00:03:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:45,981 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:45,981 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:45,998 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 00:03:46,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:46,182 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash -183781140, now seen corresponding path program 17 times [2022-02-11 00:03:46,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:46,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67585105] [2022-02-11 00:03:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:03:46,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:46,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67585105] [2022-02-11 00:03:46,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67585105] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:46,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244553405] [2022-02-11 00:03:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:03:46,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:46,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:46,222 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 00:03:46,223 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 00:03:46,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:03:46,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:03:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:03:46,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:03:46,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244553405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:46,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:46,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-02-11 00:03:46,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645192368] [2022-02-11 00:03:46,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:46,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:03:46,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:03:46,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:03:46,318 INFO L87 Difference]: Start difference. First operand 23391 states and 59293 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:46,439 INFO L93 Difference]: Finished difference Result 19626 states and 48862 transitions. [2022-02-11 00:03:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:03:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:46,474 INFO L225 Difference]: With dead ends: 19626 [2022-02-11 00:03:46,474 INFO L226 Difference]: Without dead ends: 19088 [2022-02-11 00:03:46,474 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:03:46,475 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:46,475 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19088 states. [2022-02-11 00:03:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19088 to 18247. [2022-02-11 00:03:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18247 states, 18246 states have (on average 2.5042749095692205) internal successors, (45693), 18246 states have internal predecessors, (45693), 0 states have call successors, (0), 0 states 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 00:03:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18247 states to 18247 states and 45693 transitions. [2022-02-11 00:03:46,892 INFO L78 Accepts]: Start accepts. Automaton has 18247 states and 45693 transitions. Word has length 29 [2022-02-11 00:03:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 18247 states and 45693 transitions. [2022-02-11 00:03:46,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 18247 states and 45693 transitions. [2022-02-11 00:03:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:46,901 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:46,901 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:46,917 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 00:03:47,117 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,SelfDestructingSolverStorable22 [2022-02-11 00:03:47,117 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1939288821, now seen corresponding path program 3 times [2022-02-11 00:03:47,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:47,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684250023] [2022-02-11 00:03:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:47,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:47,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:47,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684250023] [2022-02-11 00:03:47,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684250023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:47,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324028423] [2022-02-11 00:03:47,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:03:47,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:47,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:47,144 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 00:03:47,146 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 00:03:47,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:03:47,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:47,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:03:47,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:47,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:47,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324028423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:47,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:47,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:03:47,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912494484] [2022-02-11 00:03:47,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:47,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:03:47,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:03:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:03:47,255 INFO L87 Difference]: Start difference. First operand 18247 states and 45693 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:47,464 INFO L93 Difference]: Finished difference Result 23138 states and 57057 transitions. [2022-02-11 00:03:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:03:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:47,507 INFO L225 Difference]: With dead ends: 23138 [2022-02-11 00:03:47,507 INFO L226 Difference]: Without dead ends: 23135 [2022-02-11 00:03:47,508 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:03:47,508 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:47,508 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 149 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23135 states. [2022-02-11 00:03:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23135 to 19973. [2022-02-11 00:03:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19973 states, 19972 states have (on average 2.5174243941518126) internal successors, (50278), 19972 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states 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 00:03:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19973 states to 19973 states and 50278 transitions. [2022-02-11 00:03:47,869 INFO L78 Accepts]: Start accepts. Automaton has 19973 states and 50278 transitions. Word has length 29 [2022-02-11 00:03:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:47,870 INFO L470 AbstractCegarLoop]: Abstraction has 19973 states and 50278 transitions. [2022-02-11 00:03:47,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 19973 states and 50278 transitions. [2022-02-11 00:03:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:47,878 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:47,878 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:47,895 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 00:03:48,094 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,SelfDestructingSolverStorable23 [2022-02-11 00:03:48,094 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:48,095 INFO L85 PathProgramCache]: Analyzing trace with hash -976130165, now seen corresponding path program 4 times [2022-02-11 00:03:48,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:48,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546019824] [2022-02-11 00:03:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:48,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:48,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:48,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546019824] [2022-02-11 00:03:48,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546019824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:48,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875531318] [2022-02-11 00:03:48,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:03:48,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:48,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:48,126 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 00:03:48,127 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 00:03:48,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:03:48,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:48,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:03:48,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:03:48,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:03:48,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875531318] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:48,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:48,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:03:48,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193385518] [2022-02-11 00:03:48,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:48,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:03:48,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:03:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:03:48,251 INFO L87 Difference]: Start difference. First operand 19973 states and 50278 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:48,448 INFO L93 Difference]: Finished difference Result 30211 states and 74727 transitions. [2022-02-11 00:03:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:03:48,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:48,733 INFO L225 Difference]: With dead ends: 30211 [2022-02-11 00:03:48,733 INFO L226 Difference]: Without dead ends: 30205 [2022-02-11 00:03:48,733 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:03:48,734 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:48,750 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 108 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:03:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30205 states. [2022-02-11 00:03:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30205 to 21738. [2022-02-11 00:03:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21738 states, 21737 states have (on average 2.5046234530984037) internal successors, (54443), 21737 states have internal predecessors, (54443), 0 states have call successors, (0), 0 states 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 00:03:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21738 states to 21738 states and 54443 transitions. [2022-02-11 00:03:49,375 INFO L78 Accepts]: Start accepts. Automaton has 21738 states and 54443 transitions. Word has length 29 [2022-02-11 00:03:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:49,375 INFO L470 AbstractCegarLoop]: Abstraction has 21738 states and 54443 transitions. [2022-02-11 00:03:49,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 21738 states and 54443 transitions. [2022-02-11 00:03:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:49,387 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:49,387 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:49,410 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 00:03:49,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:49,610 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1681264675, now seen corresponding path program 5 times [2022-02-11 00:03:49,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:49,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823335966] [2022-02-11 00:03:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:49,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:03:49,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:49,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823335966] [2022-02-11 00:03:49,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823335966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:49,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052949062] [2022-02-11 00:03:49,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:03:49,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:49,692 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 00:03:49,693 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 00:03:49,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:03:49,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:03:49,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:49,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:49,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052949062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:49,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:49,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-11 00:03:49,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323149622] [2022-02-11 00:03:49,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:49,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 00:03:49,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 00:03:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:03:49,826 INFO L87 Difference]: Start difference. First operand 21738 states and 54443 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:50,043 INFO L93 Difference]: Finished difference Result 27079 states and 66694 transitions. [2022-02-11 00:03:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:03:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:50,110 INFO L225 Difference]: With dead ends: 27079 [2022-02-11 00:03:50,111 INFO L226 Difference]: Without dead ends: 27067 [2022-02-11 00:03:50,111 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:03:50,111 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:50,112 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 120 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:03:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27067 states. [2022-02-11 00:03:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27067 to 22680. [2022-02-11 00:03:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22680 states, 22679 states have (on average 2.5144847656422242) internal successors, (57026), 22679 states have internal predecessors, (57026), 0 states have call successors, (0), 0 states 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 00:03:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22680 states to 22680 states and 57026 transitions. [2022-02-11 00:03:50,710 INFO L78 Accepts]: Start accepts. Automaton has 22680 states and 57026 transitions. Word has length 29 [2022-02-11 00:03:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:50,710 INFO L470 AbstractCegarLoop]: Abstraction has 22680 states and 57026 transitions. [2022-02-11 00:03:50,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 22680 states and 57026 transitions. [2022-02-11 00:03:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:50,722 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:50,722 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:50,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 00:03:50,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:50,938 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash -587660293, now seen corresponding path program 18 times [2022-02-11 00:03:50,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:50,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550829369] [2022-02-11 00:03:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:50,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:50,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:50,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550829369] [2022-02-11 00:03:50,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550829369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:50,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102004471] [2022-02-11 00:03:50,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:03:50,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:50,987 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 00:03:51,029 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 00:03:51,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:03:51,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:03:51,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:51,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:51,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102004471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:51,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:51,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:03:51,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481555757] [2022-02-11 00:03:51,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:51,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:03:51,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:51,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:03:51,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:03:51,135 INFO L87 Difference]: Start difference. First operand 22680 states and 57026 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:51,291 INFO L93 Difference]: Finished difference Result 28120 states and 70004 transitions. [2022-02-11 00:03:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:03:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:51,342 INFO L225 Difference]: With dead ends: 28120 [2022-02-11 00:03:51,343 INFO L226 Difference]: Without dead ends: 27988 [2022-02-11 00:03:51,343 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:03:51,344 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 75 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:51,344 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 102 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:03:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27988 states. [2022-02-11 00:03:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27988 to 27218. [2022-02-11 00:03:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27218 states, 27217 states have (on average 2.5050152478230516) internal successors, (68179), 27217 states have internal predecessors, (68179), 0 states have call successors, (0), 0 states 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 00:03:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27218 states to 27218 states and 68179 transitions. [2022-02-11 00:03:52,131 INFO L78 Accepts]: Start accepts. Automaton has 27218 states and 68179 transitions. Word has length 29 [2022-02-11 00:03:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:52,132 INFO L470 AbstractCegarLoop]: Abstraction has 27218 states and 68179 transitions. [2022-02-11 00:03:52,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 27218 states and 68179 transitions. [2022-02-11 00:03:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:52,143 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:52,144 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:52,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-11 00:03:52,359 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,SelfDestructingSolverStorable26 [2022-02-11 00:03:52,360 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1682739263, now seen corresponding path program 19 times [2022-02-11 00:03:52,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:52,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376027347] [2022-02-11 00:03:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:52,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:52,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:52,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376027347] [2022-02-11 00:03:52,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376027347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:52,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121281118] [2022-02-11 00:03:52,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:03:52,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:52,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:52,386 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 00:03:52,387 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 00:03:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:03:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:03:52,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:03:52,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121281118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:52,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:52,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:03:52,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879572422] [2022-02-11 00:03:52,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:52,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:03:52,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:52,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:03:52,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:03:52,501 INFO L87 Difference]: Start difference. First operand 27218 states and 68179 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:52,651 INFO L93 Difference]: Finished difference Result 27540 states and 68054 transitions. [2022-02-11 00:03:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:03:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:52,704 INFO L225 Difference]: With dead ends: 27540 [2022-02-11 00:03:52,705 INFO L226 Difference]: Without dead ends: 27537 [2022-02-11 00:03:52,705 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:03:52,705 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:52,705 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27537 states. [2022-02-11 00:03:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27537 to 27194. [2022-02-11 00:03:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27194 states, 27193 states have (on average 2.4762254992093555) internal successors, (67336), 27193 states have internal predecessors, (67336), 0 states have call successors, (0), 0 states 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 00:03:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27194 states to 27194 states and 67336 transitions. [2022-02-11 00:03:53,256 INFO L78 Accepts]: Start accepts. Automaton has 27194 states and 67336 transitions. Word has length 29 [2022-02-11 00:03:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:53,256 INFO L470 AbstractCegarLoop]: Abstraction has 27194 states and 67336 transitions. [2022-02-11 00:03:53,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 27194 states and 67336 transitions. [2022-02-11 00:03:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:53,266 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:53,266 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:53,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 00:03:53,483 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,SelfDestructingSolverStorable27 [2022-02-11 00:03:53,483 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash -712336569, now seen corresponding path program 20 times [2022-02-11 00:03:53,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:53,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353137161] [2022-02-11 00:03:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:53,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:53,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353137161] [2022-02-11 00:03:53,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353137161] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:53,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902814467] [2022-02-11 00:03:53,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:03:53,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:53,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:53,505 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 00:03:53,506 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 00:03:53,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:03:53,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:03:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:03:53,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:03:53,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902814467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:53,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:53,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:03:53,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992249191] [2022-02-11 00:03:53,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:53,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:03:53,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:53,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:03:53,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:03:53,628 INFO L87 Difference]: Start difference. First operand 27194 states and 67336 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:53,927 INFO L93 Difference]: Finished difference Result 31849 states and 78450 transitions. [2022-02-11 00:03:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:03:53,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:54,002 INFO L225 Difference]: With dead ends: 31849 [2022-02-11 00:03:54,002 INFO L226 Difference]: Without dead ends: 31837 [2022-02-11 00:03:54,003 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:03:54,003 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:54,003 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 97 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31837 states. [2022-02-11 00:03:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31837 to 31644. [2022-02-11 00:03:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31644 states, 31643 states have (on average 2.4666118888853776) internal successors, (78051), 31643 states have internal predecessors, (78051), 0 states have call successors, (0), 0 states 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 00:03:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31644 states to 31644 states and 78051 transitions. [2022-02-11 00:03:54,630 INFO L78 Accepts]: Start accepts. Automaton has 31644 states and 78051 transitions. Word has length 29 [2022-02-11 00:03:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:54,630 INFO L470 AbstractCegarLoop]: Abstraction has 31644 states and 78051 transitions. [2022-02-11 00:03:54,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 31644 states and 78051 transitions. [2022-02-11 00:03:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:54,640 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:54,640 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:54,656 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 00:03:54,856 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,SelfDestructingSolverStorable28 [2022-02-11 00:03:54,856 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:54,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1117704309, now seen corresponding path program 21 times [2022-02-11 00:03:54,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:54,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447387552] [2022-02-11 00:03:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:54,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:54,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:54,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447387552] [2022-02-11 00:03:54,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447387552] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:54,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418786462] [2022-02-11 00:03:54,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:03:54,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:54,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:54,881 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 00:03:54,886 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 00:03:54,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:03:54,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:03:54,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:03:54,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:03:54,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418786462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:54,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:54,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:03:54,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157019551] [2022-02-11 00:03:54,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:54,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:03:54,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:03:54,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:03:54,998 INFO L87 Difference]: Start difference. First operand 31644 states and 78051 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:55,174 INFO L93 Difference]: Finished difference Result 32521 states and 79874 transitions. [2022-02-11 00:03:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:03:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:55,253 INFO L225 Difference]: With dead ends: 32521 [2022-02-11 00:03:55,253 INFO L226 Difference]: Without dead ends: 32518 [2022-02-11 00:03:55,253 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:03:55,254 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:55,254 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 78 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:03:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32518 states. [2022-02-11 00:03:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32518 to 32276. [2022-02-11 00:03:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32276 states, 32275 states have (on average 2.4610069713400464) internal successors, (79429), 32275 states have internal predecessors, (79429), 0 states have call successors, (0), 0 states 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 00:03:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32276 states to 32276 states and 79429 transitions. [2022-02-11 00:03:56,181 INFO L78 Accepts]: Start accepts. Automaton has 32276 states and 79429 transitions. Word has length 29 [2022-02-11 00:03:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:56,181 INFO L470 AbstractCegarLoop]: Abstraction has 32276 states and 79429 transitions. [2022-02-11 00:03:56,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 32276 states and 79429 transitions. [2022-02-11 00:03:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:03:56,193 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:56,194 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:56,216 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 00:03:56,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:56,403 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash -652390267, now seen corresponding path program 22 times [2022-02-11 00:03:56,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:56,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963720934] [2022-02-11 00:03:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:56,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:56,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:56,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963720934] [2022-02-11 00:03:56,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963720934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:56,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906983292] [2022-02-11 00:03:56,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:03:56,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:56,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:56,440 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 00:03:56,442 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 00:03:56,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:03:56,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:56,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:03:56,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:56,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:03:56,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906983292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:56,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:56,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-11 00:03:56,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018948277] [2022-02-11 00:03:56,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:56,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:03:56,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:56,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:03:56,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:03:56,581 INFO L87 Difference]: Start difference. First operand 32276 states and 79429 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:03:56,792 INFO L93 Difference]: Finished difference Result 32461 states and 78954 transitions. [2022-02-11 00:03:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:03:56,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:03:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:03:56,871 INFO L225 Difference]: With dead ends: 32461 [2022-02-11 00:03:56,871 INFO L226 Difference]: Without dead ends: 32458 [2022-02-11 00:03:56,871 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:03:56,872 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:03:56,872 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 103 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:03:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32458 states. [2022-02-11 00:03:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32458 to 31677. [2022-02-11 00:03:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31677 states, 31676 states have (on average 2.4392600075767144) internal successors, (77266), 31676 states have internal predecessors, (77266), 0 states have call successors, (0), 0 states 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 00:03:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31677 states to 31677 states and 77266 transitions. [2022-02-11 00:03:57,864 INFO L78 Accepts]: Start accepts. Automaton has 31677 states and 77266 transitions. Word has length 29 [2022-02-11 00:03:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:03:57,864 INFO L470 AbstractCegarLoop]: Abstraction has 31677 states and 77266 transitions. [2022-02-11 00:03:57,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:03:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 31677 states and 77266 transitions. [2022-02-11 00:03:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 00:03:57,879 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:03:57,879 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:03:57,899 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 00:03:58,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:58,094 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:03:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:03:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1949861535, now seen corresponding path program 23 times [2022-02-11 00:03:58,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:03:58,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282046449] [2022-02-11 00:03:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:03:58,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:03:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:03:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:03:58,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:03:58,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282046449] [2022-02-11 00:03:58,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282046449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:03:58,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201888623] [2022-02-11 00:03:58,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:03:58,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:03:58,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:03:58,348 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 00:03:58,350 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 00:03:58,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:03:58,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:03:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:03:58,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:03:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:58,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:03:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:03:59,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201888623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:03:59,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:03:59,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2022-02-11 00:03:59,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127490910] [2022-02-11 00:03:59,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:03:59,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:03:59,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:03:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:03:59,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:03:59,062 INFO L87 Difference]: Start difference. First operand 31677 states and 77266 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 00:04:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:04,069 INFO L93 Difference]: Finished difference Result 58198 states and 139350 transitions. [2022-02-11 00:04:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-11 00:04:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 31 [2022-02-11 00:04:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:04,198 INFO L225 Difference]: With dead ends: 58198 [2022-02-11 00:04:04,198 INFO L226 Difference]: Without dead ends: 58059 [2022-02-11 00:04:04,199 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6410 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2189, Invalid=18117, Unknown=0, NotChecked=0, Total=20306 [2022-02-11 00:04:04,200 INFO L934 BasicCegarLoop]: 241 mSDtfsCounter, 589 mSDsluCounter, 4159 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 3939 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:04,200 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 3939 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:04:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58059 states. [2022-02-11 00:04:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58059 to 49360. [2022-02-11 00:04:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49360 states, 49359 states have (on average 2.4268117263315707) internal successors, (119785), 49359 states have internal predecessors, (119785), 0 states have call successors, (0), 0 states 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 00:04:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49360 states to 49360 states and 119785 transitions. [2022-02-11 00:04:05,403 INFO L78 Accepts]: Start accepts. Automaton has 49360 states and 119785 transitions. Word has length 31 [2022-02-11 00:04:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:05,403 INFO L470 AbstractCegarLoop]: Abstraction has 49360 states and 119785 transitions. [2022-02-11 00:04:05,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 00:04:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 49360 states and 119785 transitions. [2022-02-11 00:04:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:05,421 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:05,421 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:05,444 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 00:04:05,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:05,636 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:05,636 INFO L85 PathProgramCache]: Analyzing trace with hash 364490902, now seen corresponding path program 24 times [2022-02-11 00:04:05,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:05,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735220507] [2022-02-11 00:04:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:05,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:05,836 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 00:04:05,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:05,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735220507] [2022-02-11 00:04:05,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735220507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:05,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862091925] [2022-02-11 00:04:05,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:04:05,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:05,838 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 00:04:05,839 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 00:04:05,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:04:05,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:05,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:05,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:06,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:06,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862091925] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:06,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:06,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 00:04:06,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358144398] [2022-02-11 00:04:06,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:06,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:04:06,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:04:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:04:06,524 INFO L87 Difference]: Start difference. First operand 49360 states and 119785 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 00:04:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:07,740 INFO L93 Difference]: Finished difference Result 56844 states and 136543 transitions. [2022-02-11 00:04:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:04:07,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:07,884 INFO L225 Difference]: With dead ends: 56844 [2022-02-11 00:04:07,884 INFO L226 Difference]: Without dead ends: 56827 [2022-02-11 00:04:07,885 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:04:07,885 INFO L934 BasicCegarLoop]: 85 mSDtfsCounter, 346 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:07,885 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 949 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:04:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2022-02-11 00:04:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 50980. [2022-02-11 00:04:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50980 states, 50979 states have (on average 2.429882892955923) internal successors, (123873), 50979 states have internal predecessors, (123873), 0 states have call successors, (0), 0 states 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 00:04:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50980 states to 50980 states and 123873 transitions. [2022-02-11 00:04:09,273 INFO L78 Accepts]: Start accepts. Automaton has 50980 states and 123873 transitions. Word has length 32 [2022-02-11 00:04:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:09,274 INFO L470 AbstractCegarLoop]: Abstraction has 50980 states and 123873 transitions. [2022-02-11 00:04:09,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 00:04:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 50980 states and 123873 transitions. [2022-02-11 00:04:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:09,288 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:09,289 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:09,316 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 00:04:09,506 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,SelfDestructingSolverStorable32 [2022-02-11 00:04:09,506 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash -870392482, now seen corresponding path program 25 times [2022-02-11 00:04:09,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:09,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547347685] [2022-02-11 00:04:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:09,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:09,713 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 00:04:09,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:09,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547347685] [2022-02-11 00:04:09,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547347685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:09,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977261277] [2022-02-11 00:04:09,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:04:09,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:09,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:09,715 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 00:04:09,716 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 00:04:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:09,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:10,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977261277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:10,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:10,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 00:04:10,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977552607] [2022-02-11 00:04:10,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:10,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:04:10,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:04:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:04:10,109 INFO L87 Difference]: Start difference. First operand 50980 states and 123873 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 00:04:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:10,823 INFO L93 Difference]: Finished difference Result 54768 states and 132232 transitions. [2022-02-11 00:04:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:04:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:11,111 INFO L225 Difference]: With dead ends: 54768 [2022-02-11 00:04:11,112 INFO L226 Difference]: Without dead ends: 54751 [2022-02-11 00:04:11,112 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=1698, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:04:11,112 INFO L934 BasicCegarLoop]: 79 mSDtfsCounter, 265 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:11,112 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 699 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:04:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54751 states. [2022-02-11 00:04:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54751 to 51314. [2022-02-11 00:04:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51314 states, 51313 states have (on average 2.42998850193908) internal successors, (124690), 51313 states have internal predecessors, (124690), 0 states have call successors, (0), 0 states 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 00:04:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51314 states to 51314 states and 124690 transitions. [2022-02-11 00:04:12,106 INFO L78 Accepts]: Start accepts. Automaton has 51314 states and 124690 transitions. Word has length 32 [2022-02-11 00:04:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:12,106 INFO L470 AbstractCegarLoop]: Abstraction has 51314 states and 124690 transitions. [2022-02-11 00:04:12,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 00:04:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 51314 states and 124690 transitions. [2022-02-11 00:04:12,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:12,121 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:12,121 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:12,137 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 00:04:12,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:12,336 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1401588830, now seen corresponding path program 26 times [2022-02-11 00:04:12,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:12,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938656844] [2022-02-11 00:04:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:12,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:12,552 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 00:04:12,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:12,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938656844] [2022-02-11 00:04:12,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938656844] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:12,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703329098] [2022-02-11 00:04:12,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:04:12,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:12,554 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 00:04:12,554 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 00:04:12,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:04:12,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:12,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:04:12,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:04:13,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703329098] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:13,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:13,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 00:04:13,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888660825] [2022-02-11 00:04:13,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:13,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:04:13,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:04:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:04:13,026 INFO L87 Difference]: Start difference. First operand 51314 states and 124690 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:14,548 INFO L93 Difference]: Finished difference Result 64967 states and 156641 transitions. [2022-02-11 00:04:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:04:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:14,777 INFO L225 Difference]: With dead ends: 64967 [2022-02-11 00:04:14,777 INFO L226 Difference]: Without dead ends: 64904 [2022-02-11 00:04:14,777 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:04:14,778 INFO L934 BasicCegarLoop]: 85 mSDtfsCounter, 277 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:14,778 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1076 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:04:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64904 states. [2022-02-11 00:04:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64904 to 57619. [2022-02-11 00:04:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57619 states, 57618 states have (on average 2.4426220972612724) internal successors, (140739), 57618 states have internal predecessors, (140739), 0 states have call successors, (0), 0 states 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 00:04:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57619 states to 57619 states and 140739 transitions. [2022-02-11 00:04:16,022 INFO L78 Accepts]: Start accepts. Automaton has 57619 states and 140739 transitions. Word has length 32 [2022-02-11 00:04:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:16,022 INFO L470 AbstractCegarLoop]: Abstraction has 57619 states and 140739 transitions. [2022-02-11 00:04:16,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 57619 states and 140739 transitions. [2022-02-11 00:04:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:16,045 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:16,045 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:16,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 00:04:16,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:16,259 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1434729592, now seen corresponding path program 27 times [2022-02-11 00:04:16,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:16,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094345485] [2022-02-11 00:04:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:16,378 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 00:04:16,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:16,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094345485] [2022-02-11 00:04:16,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094345485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:16,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851144965] [2022-02-11 00:04:16,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:04:16,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:16,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:16,396 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 00:04:16,408 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 00:04:16,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:04:16,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:16,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:16,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:17,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851144965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:17,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:17,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-02-11 00:04:17,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041499979] [2022-02-11 00:04:17,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:17,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:04:17,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:17,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:04:17,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:04:17,269 INFO L87 Difference]: Start difference. First operand 57619 states and 140739 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:19,270 INFO L93 Difference]: Finished difference Result 72626 states and 176105 transitions. [2022-02-11 00:04:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 00:04:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:19,433 INFO L225 Difference]: With dead ends: 72626 [2022-02-11 00:04:19,434 INFO L226 Difference]: Without dead ends: 72563 [2022-02-11 00:04:19,434 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=915, Invalid=5405, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:04:19,435 INFO L934 BasicCegarLoop]: 165 mSDtfsCounter, 540 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 1803 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:19,435 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 2006 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1803 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:04:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72563 states. [2022-02-11 00:04:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72563 to 64327. [2022-02-11 00:04:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64327 states, 64326 states have (on average 2.448683269595498) internal successors, (157514), 64326 states have internal predecessors, (157514), 0 states have call successors, (0), 0 states 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 00:04:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64327 states to 64327 states and 157514 transitions. [2022-02-11 00:04:20,818 INFO L78 Accepts]: Start accepts. Automaton has 64327 states and 157514 transitions. Word has length 32 [2022-02-11 00:04:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:20,818 INFO L470 AbstractCegarLoop]: Abstraction has 64327 states and 157514 transitions. [2022-02-11 00:04:20,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 64327 states and 157514 transitions. [2022-02-11 00:04:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:20,842 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:20,842 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:20,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 00:04:21,058 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,SelfDestructingSolverStorable35 [2022-02-11 00:04:21,058 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash 837251720, now seen corresponding path program 28 times [2022-02-11 00:04:21,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:21,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670809691] [2022-02-11 00:04:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:21,384 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 00:04:21,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:21,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670809691] [2022-02-11 00:04:21,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670809691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:21,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369458293] [2022-02-11 00:04:21,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:04:21,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:21,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:21,416 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 00:04:21,434 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 00:04:21,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:04:21,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:21,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:04:21,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:04:21,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369458293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:21,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:21,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 00:04:21,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590204442] [2022-02-11 00:04:21,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:21,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:04:21,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:04:21,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:04:21,952 INFO L87 Difference]: Start difference. First operand 64327 states and 157514 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:22,971 INFO L93 Difference]: Finished difference Result 83954 states and 203391 transitions. [2022-02-11 00:04:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:04:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:23,397 INFO L225 Difference]: With dead ends: 83954 [2022-02-11 00:04:23,397 INFO L226 Difference]: Without dead ends: 83893 [2022-02-11 00:04:23,397 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:04:23,398 INFO L934 BasicCegarLoop]: 72 mSDtfsCounter, 246 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:23,398 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 879 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:04:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83893 states. [2022-02-11 00:04:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83893 to 73827. [2022-02-11 00:04:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73827 states, 73826 states have (on average 2.455435754341289) internal successors, (181275), 73826 states have internal predecessors, (181275), 0 states have call successors, (0), 0 states 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 00:04:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73827 states to 73827 states and 181275 transitions. [2022-02-11 00:04:25,173 INFO L78 Accepts]: Start accepts. Automaton has 73827 states and 181275 transitions. Word has length 32 [2022-02-11 00:04:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:25,173 INFO L470 AbstractCegarLoop]: Abstraction has 73827 states and 181275 transitions. [2022-02-11 00:04:25,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 73827 states and 181275 transitions. [2022-02-11 00:04:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:25,196 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:25,196 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:25,212 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 00:04:25,411 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,SelfDestructingSolverStorable36 [2022-02-11 00:04:25,412 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash -609168994, now seen corresponding path program 29 times [2022-02-11 00:04:25,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:25,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909865124] [2022-02-11 00:04:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:25,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:25,528 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 00:04:25,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:25,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909865124] [2022-02-11 00:04:25,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909865124] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:25,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315851576] [2022-02-11 00:04:25,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:04:25,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:25,530 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 00:04:25,531 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 00:04:25,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:04:25,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:25,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:25,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:25,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:26,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315851576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:26,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:26,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 00:04:26,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927573398] [2022-02-11 00:04:26,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:26,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:04:26,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:04:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:04:26,029 INFO L87 Difference]: Start difference. First operand 73827 states and 181275 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 00:04:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:27,665 INFO L93 Difference]: Finished difference Result 79410 states and 194385 transitions. [2022-02-11 00:04:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:04:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:27,840 INFO L225 Difference]: With dead ends: 79410 [2022-02-11 00:04:27,840 INFO L226 Difference]: Without dead ends: 79376 [2022-02-11 00:04:27,840 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=2591, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:04:27,841 INFO L934 BasicCegarLoop]: 65 mSDtfsCounter, 266 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:27,841 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 962 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:04:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79376 states. [2022-02-11 00:04:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79376 to 76802. [2022-02-11 00:04:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76802 states, 76801 states have (on average 2.4606059816929466) internal successors, (188977), 76801 states have internal predecessors, (188977), 0 states have call successors, (0), 0 states 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 00:04:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76802 states to 76802 states and 188977 transitions. [2022-02-11 00:04:29,621 INFO L78 Accepts]: Start accepts. Automaton has 76802 states and 188977 transitions. Word has length 32 [2022-02-11 00:04:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:29,621 INFO L470 AbstractCegarLoop]: Abstraction has 76802 states and 188977 transitions. [2022-02-11 00:04:29,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 00:04:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 76802 states and 188977 transitions. [2022-02-11 00:04:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:29,647 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:29,648 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:29,666 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 00:04:29,864 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,SelfDestructingSolverStorable37 [2022-02-11 00:04:29,864 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1086215526, now seen corresponding path program 30 times [2022-02-11 00:04:29,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:29,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636439446] [2022-02-11 00:04:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:30,009 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 00:04:30,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:30,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636439446] [2022-02-11 00:04:30,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636439446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:30,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454194657] [2022-02-11 00:04:30,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:04:30,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:30,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:30,010 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 00:04:30,055 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 00:04:30,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:04:30,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:30,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:04:30,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:04:30,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454194657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:30,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:30,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 00:04:30,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240352087] [2022-02-11 00:04:30,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:30,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:04:30,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:04:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:04:30,501 INFO L87 Difference]: Start difference. First operand 76802 states and 188977 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:31,764 INFO L93 Difference]: Finished difference Result 81543 states and 199903 transitions. [2022-02-11 00:04:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:04:31,765 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:31,946 INFO L225 Difference]: With dead ends: 81543 [2022-02-11 00:04:31,946 INFO L226 Difference]: Without dead ends: 81497 [2022-02-11 00:04:31,947 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:04:31,947 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 242 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:31,947 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 566 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:04:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81497 states. [2022-02-11 00:04:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81497 to 79939. [2022-02-11 00:04:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79939 states, 79938 states have (on average 2.4604318346718705) internal successors, (196682), 79938 states have internal predecessors, (196682), 0 states have call successors, (0), 0 states 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 00:04:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79939 states to 79939 states and 196682 transitions. [2022-02-11 00:04:33,836 INFO L78 Accepts]: Start accepts. Automaton has 79939 states and 196682 transitions. Word has length 32 [2022-02-11 00:04:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:33,836 INFO L470 AbstractCegarLoop]: Abstraction has 79939 states and 196682 transitions. [2022-02-11 00:04:33,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 79939 states and 196682 transitions. [2022-02-11 00:04:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:33,860 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:33,861 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:33,879 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 00:04:34,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 00:04:34,077 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:34,078 INFO L85 PathProgramCache]: Analyzing trace with hash 505632738, now seen corresponding path program 31 times [2022-02-11 00:04:34,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:34,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466348503] [2022-02-11 00:04:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:34,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:34,267 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 00:04:34,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:34,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466348503] [2022-02-11 00:04:34,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466348503] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:34,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242800830] [2022-02-11 00:04:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:04:34,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:34,269 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 00:04:34,270 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 00:04:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:34,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:34,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242800830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:34,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:34,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-02-11 00:04:34,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979017619] [2022-02-11 00:04:34,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:34,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:04:34,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:34,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:04:34,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:04:34,719 INFO L87 Difference]: Start difference. First operand 79939 states and 196682 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:35,858 INFO L93 Difference]: Finished difference Result 92793 states and 226902 transitions. [2022-02-11 00:04:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:04:35,859 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:36,059 INFO L225 Difference]: With dead ends: 92793 [2022-02-11 00:04:36,060 INFO L226 Difference]: Without dead ends: 92750 [2022-02-11 00:04:36,060 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:04:36,060 INFO L934 BasicCegarLoop]: 66 mSDtfsCounter, 212 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:36,063 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 720 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:04:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92750 states. [2022-02-11 00:04:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92750 to 84575. [2022-02-11 00:04:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84575 states, 84574 states have (on average 2.4647527608957835) internal successors, (208454), 84574 states have internal predecessors, (208454), 0 states have call successors, (0), 0 states 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 00:04:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84575 states to 84575 states and 208454 transitions. [2022-02-11 00:04:38,188 INFO L78 Accepts]: Start accepts. Automaton has 84575 states and 208454 transitions. Word has length 32 [2022-02-11 00:04:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:38,189 INFO L470 AbstractCegarLoop]: Abstraction has 84575 states and 208454 transitions. [2022-02-11 00:04:38,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 84575 states and 208454 transitions. [2022-02-11 00:04:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:38,543 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:38,543 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:38,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-11 00:04:38,759 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,SelfDestructingSolverStorable39 [2022-02-11 00:04:38,759 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1012014960, now seen corresponding path program 32 times [2022-02-11 00:04:38,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:38,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484334033] [2022-02-11 00:04:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:38,908 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 00:04:38,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:38,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484334033] [2022-02-11 00:04:38,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484334033] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:38,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053122515] [2022-02-11 00:04:38,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:04:38,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:38,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:38,910 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 00:04:38,911 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 00:04:38,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:04:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:38,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:38,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:04:39,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:04:39,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053122515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:39,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:39,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 21 [2022-02-11 00:04:39,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009030994] [2022-02-11 00:04:39,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:39,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:04:39,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:04:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:04:39,345 INFO L87 Difference]: Start difference. First operand 84575 states and 208454 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 00:04:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:40,125 INFO L93 Difference]: Finished difference Result 95832 states and 234336 transitions. [2022-02-11 00:04:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:04:40,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 32 [2022-02-11 00:04:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:40,643 INFO L225 Difference]: With dead ends: 95832 [2022-02-11 00:04:40,644 INFO L226 Difference]: Without dead ends: 95790 [2022-02-11 00:04:40,644 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:04:40,644 INFO L934 BasicCegarLoop]: 69 mSDtfsCounter, 227 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:40,644 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 750 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:04:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95790 states. [2022-02-11 00:04:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95790 to 88530. [2022-02-11 00:04:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88530 states, 88529 states have (on average 2.4685809169876536) internal successors, (218541), 88529 states have internal predecessors, (218541), 0 states have call successors, (0), 0 states 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 00:04:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88530 states to 88530 states and 218541 transitions. [2022-02-11 00:04:42,878 INFO L78 Accepts]: Start accepts. Automaton has 88530 states and 218541 transitions. Word has length 32 [2022-02-11 00:04:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:42,879 INFO L470 AbstractCegarLoop]: Abstraction has 88530 states and 218541 transitions. [2022-02-11 00:04:42,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 00:04:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 88530 states and 218541 transitions. [2022-02-11 00:04:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:42,916 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:42,919 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:42,936 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 00:04:43,135 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,SelfDestructingSolverStorable40 [2022-02-11 00:04:43,135 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:43,137 INFO L85 PathProgramCache]: Analyzing trace with hash 371496324, now seen corresponding path program 33 times [2022-02-11 00:04:43,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:43,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374404177] [2022-02-11 00:04:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:43,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:43,281 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 00:04:43,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:43,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374404177] [2022-02-11 00:04:43,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374404177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:43,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692055971] [2022-02-11 00:04:43,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:04:43,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:43,282 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 00:04:43,283 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 00:04:43,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:04:43,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:43,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:43,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:43,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:43,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692055971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:43,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:43,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-11 00:04:43,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677365596] [2022-02-11 00:04:43,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:43,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:04:43,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:04:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:04:43,824 INFO L87 Difference]: Start difference. First operand 88530 states and 218541 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:45,811 INFO L93 Difference]: Finished difference Result 120751 states and 294981 transitions. [2022-02-11 00:04:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:04:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:46,391 INFO L225 Difference]: With dead ends: 120751 [2022-02-11 00:04:46,391 INFO L226 Difference]: Without dead ends: 120710 [2022-02-11 00:04:46,391 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=480, Invalid=3060, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:04:46,393 INFO L934 BasicCegarLoop]: 122 mSDtfsCounter, 334 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:46,393 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1644 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:04:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120710 states. [2022-02-11 00:04:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120710 to 106952. [2022-02-11 00:04:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106952 states, 106951 states have (on average 2.4723003992482537) internal successors, (264415), 106951 states have internal predecessors, (264415), 0 states have call successors, (0), 0 states 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 00:04:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106952 states to 106952 states and 264415 transitions. [2022-02-11 00:04:48,949 INFO L78 Accepts]: Start accepts. Automaton has 106952 states and 264415 transitions. Word has length 32 [2022-02-11 00:04:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:48,951 INFO L470 AbstractCegarLoop]: Abstraction has 106952 states and 264415 transitions. [2022-02-11 00:04:48,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:04:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 106952 states and 264415 transitions. [2022-02-11 00:04:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:04:48,988 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:48,988 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:49,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-11 00:04:49,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-11 00:04:49,195 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash -191983202, now seen corresponding path program 34 times [2022-02-11 00:04:49,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:49,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835584516] [2022-02-11 00:04:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:49,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:49,339 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 00:04:49,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:49,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835584516] [2022-02-11 00:04:49,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835584516] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:49,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540518279] [2022-02-11 00:04:49,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:04:49,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:49,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:49,340 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 00:04:49,354 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 00:04:49,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:04:49,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:49,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:04:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:49,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:49,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540518279] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:49,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:49,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-11 00:04:49,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437133675] [2022-02-11 00:04:49,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:49,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:04:49,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:04:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:04:49,875 INFO L87 Difference]: Start difference. First operand 106952 states and 264415 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 00:04:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:51,156 INFO L93 Difference]: Finished difference Result 113095 states and 278331 transitions. [2022-02-11 00:04:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:04:51,157 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-11 00:04:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:51,544 INFO L225 Difference]: With dead ends: 113095 [2022-02-11 00:04:51,545 INFO L226 Difference]: Without dead ends: 113078 [2022-02-11 00:04:51,545 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:04:51,545 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 133 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:51,545 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 592 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:04:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113078 states. [2022-02-11 00:04:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113078 to 107349. [2022-02-11 00:04:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107349 states, 107348 states have (on average 2.472146663188881) internal successors, (265380), 107348 states have internal predecessors, (265380), 0 states have call successors, (0), 0 states 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 00:04:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107349 states to 107349 states and 265380 transitions. [2022-02-11 00:04:54,284 INFO L78 Accepts]: Start accepts. Automaton has 107349 states and 265380 transitions. Word has length 32 [2022-02-11 00:04:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:54,284 INFO L470 AbstractCegarLoop]: Abstraction has 107349 states and 265380 transitions. [2022-02-11 00:04:54,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 00:04:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 107349 states and 265380 transitions. [2022-02-11 00:04:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 00:04:54,322 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:54,322 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:54,342 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 00:04:54,538 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,SelfDestructingSolverStorable42 [2022-02-11 00:04:54,539 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash -445666353, now seen corresponding path program 6 times [2022-02-11 00:04:54,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:54,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556446880] [2022-02-11 00:04:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:04:54,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:54,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556446880] [2022-02-11 00:04:54,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556446880] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:54,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689790227] [2022-02-11 00:04:54,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:04:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:54,648 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 00:04:54,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-11 00:04:54,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:54,672 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 00:04:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-11 00:04:54,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:04:54,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:04:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:04:54,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689790227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:04:54,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:04:54,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-02-11 00:04:54,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043874752] [2022-02-11 00:04:54,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:04:54,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:04:54,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:04:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:04:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:04:54,988 INFO L87 Difference]: Start difference. First operand 107349 states and 265380 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 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 00:04:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:04:56,094 INFO L93 Difference]: Finished difference Result 114109 states and 280340 transitions. [2022-02-11 00:04:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:04:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 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 00:04:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:04:56,391 INFO L225 Difference]: With dead ends: 114109 [2022-02-11 00:04:56,391 INFO L226 Difference]: Without dead ends: 112943 [2022-02-11 00:04:56,391 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:04:56,391 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 280 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:04:56,391 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 645 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:04:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112943 states. [2022-02-11 00:04:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112943 to 107149. [2022-02-11 00:04:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107149 states, 107148 states have (on average 2.4727946391906523) internal successors, (264955), 107148 states have internal predecessors, (264955), 0 states have call successors, (0), 0 states 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 00:04:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107149 states to 107149 states and 264955 transitions. [2022-02-11 00:04:58,990 INFO L78 Accepts]: Start accepts. Automaton has 107149 states and 264955 transitions. Word has length 33 [2022-02-11 00:04:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:04:58,990 INFO L470 AbstractCegarLoop]: Abstraction has 107149 states and 264955 transitions. [2022-02-11 00:04:58,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 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 00:04:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 107149 states and 264955 transitions. [2022-02-11 00:04:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 00:04:59,041 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:04:59,041 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:04:59,058 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 00:04:59,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:59,258 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:04:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:04:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2052471971, now seen corresponding path program 35 times [2022-02-11 00:04:59,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:04:59,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556378690] [2022-02-11 00:04:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:04:59,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:04:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:04:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 00:04:59,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:04:59,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556378690] [2022-02-11 00:04:59,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556378690] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:04:59,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066105633] [2022-02-11 00:04:59,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:04:59,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:04:59,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:04:59,487 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 00:04:59,488 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 00:04:59,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:04:59,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:04:59,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 00:04:59,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:04:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:04:59,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:00,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066105633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:00,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:00,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 37 [2022-02-11 00:05:00,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327949186] [2022-02-11 00:05:00,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:00,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 00:05:00,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 00:05:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:05:00,161 INFO L87 Difference]: Start difference. First operand 107149 states and 264955 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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 00:05:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:06,989 INFO L93 Difference]: Finished difference Result 164170 states and 399330 transitions. [2022-02-11 00:05:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-02-11 00:05:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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 34 [2022-02-11 00:05:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:07,789 INFO L225 Difference]: With dead ends: 164170 [2022-02-11 00:05:07,789 INFO L226 Difference]: Without dead ends: 164008 [2022-02-11 00:05:07,791 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11486 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3507, Invalid=30533, Unknown=0, NotChecked=0, Total=34040 [2022-02-11 00:05:07,792 INFO L934 BasicCegarLoop]: 290 mSDtfsCounter, 815 mSDsluCounter, 5499 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 5244 SdHoareTripleChecker+Invalid, 4297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:07,793 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 5244 Invalid, 4297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4062 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:05:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164008 states. [2022-02-11 00:05:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164008 to 145288. [2022-02-11 00:05:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145288 states, 145287 states have (on average 2.463902482672228) internal successors, (357973), 145287 states have internal predecessors, (357973), 0 states have call successors, (0), 0 states 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 00:05:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145288 states to 145288 states and 357973 transitions. [2022-02-11 00:05:12,168 INFO L78 Accepts]: Start accepts. Automaton has 145288 states and 357973 transitions. Word has length 34 [2022-02-11 00:05:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:12,169 INFO L470 AbstractCegarLoop]: Abstraction has 145288 states and 357973 transitions. [2022-02-11 00:05:12,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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 00:05:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 145288 states and 357973 transitions. [2022-02-11 00:05:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:05:12,228 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:12,228 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:12,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:12,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:12,451 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash 176267436, now seen corresponding path program 36 times [2022-02-11 00:05:12,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:12,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986483487] [2022-02-11 00:05:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:12,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:05:12,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:12,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986483487] [2022-02-11 00:05:12,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986483487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:12,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873216881] [2022-02-11 00:05:12,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:12,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:12,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:12,537 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 00:05:12,567 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 00:05:12,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:05:12,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:05:12,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:05:12,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873216881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:12,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:12,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-11 00:05:12,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570238197] [2022-02-11 00:05:12,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:12,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:05:12,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:05:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:05:12,724 INFO L87 Difference]: Start difference. First operand 145288 states and 357973 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:14,354 INFO L93 Difference]: Finished difference Result 103418 states and 247086 transitions. [2022-02-11 00:05:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:05:14,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:05:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:14,838 INFO L225 Difference]: With dead ends: 103418 [2022-02-11 00:05:14,839 INFO L226 Difference]: Without dead ends: 103418 [2022-02-11 00:05:14,839 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:05:14,839 INFO L934 BasicCegarLoop]: 48 mSDtfsCounter, 122 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:14,840 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 316 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103418 states. [2022-02-11 00:05:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103418 to 71860. [2022-02-11 00:05:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71860 states, 71859 states have (on average 2.410581833869105) internal successors, (173222), 71859 states have internal predecessors, (173222), 0 states have call successors, (0), 0 states 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 00:05:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71860 states to 71860 states and 173222 transitions. [2022-02-11 00:05:17,803 INFO L78 Accepts]: Start accepts. Automaton has 71860 states and 173222 transitions. Word has length 35 [2022-02-11 00:05:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:17,803 INFO L470 AbstractCegarLoop]: Abstraction has 71860 states and 173222 transitions. [2022-02-11 00:05:17,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 71860 states and 173222 transitions. [2022-02-11 00:05:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:05:17,839 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:17,839 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:17,864 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 00:05:18,055 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,SelfDestructingSolverStorable45 [2022-02-11 00:05:18,056 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash 624876916, now seen corresponding path program 37 times [2022-02-11 00:05:18,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:18,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027754048] [2022-02-11 00:05:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:18,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:05:18,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:18,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027754048] [2022-02-11 00:05:18,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027754048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:18,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310680742] [2022-02-11 00:05:18,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:05:18,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:18,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:18,104 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 00:05:18,106 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 00:05:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:18,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:05:18,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:05:18,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:05:18,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310680742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:18,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:18,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-11 00:05:18,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493964913] [2022-02-11 00:05:18,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:18,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:05:18,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:18,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:05:18,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:05:18,249 INFO L87 Difference]: Start difference. First operand 71860 states and 173222 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:18,632 INFO L93 Difference]: Finished difference Result 65581 states and 153600 transitions. [2022-02-11 00:05:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:05:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:05:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:18,804 INFO L225 Difference]: With dead ends: 65581 [2022-02-11 00:05:18,805 INFO L226 Difference]: Without dead ends: 65511 [2022-02-11 00:05:18,805 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:05:18,807 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 213 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:18,807 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 204 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65511 states. [2022-02-11 00:05:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65511 to 57103. [2022-02-11 00:05:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57103 states, 57102 states have (on average 2.3572904626808167) internal successors, (134606), 57102 states have internal predecessors, (134606), 0 states have call successors, (0), 0 states 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 00:05:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57103 states to 57103 states and 134606 transitions. [2022-02-11 00:05:20,795 INFO L78 Accepts]: Start accepts. Automaton has 57103 states and 134606 transitions. Word has length 35 [2022-02-11 00:05:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:20,795 INFO L470 AbstractCegarLoop]: Abstraction has 57103 states and 134606 transitions. [2022-02-11 00:05:20,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 57103 states and 134606 transitions. [2022-02-11 00:05:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:05:20,822 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:20,822 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:20,845 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 00:05:21,044 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,SelfDestructingSolverStorable46 [2022-02-11 00:05:21,044 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1359790695, now seen corresponding path program 38 times [2022-02-11 00:05:21,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:21,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266991470] [2022-02-11 00:05:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:21,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:21,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:21,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266991470] [2022-02-11 00:05:21,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266991470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:21,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665541765] [2022-02-11 00:05:21,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:21,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:21,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:21,116 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 00:05:21,165 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 00:05:21,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:21,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:05:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:21,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:21,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665541765] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:21,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:21,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:05:21,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223656793] [2022-02-11 00:05:21,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:21,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:05:21,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:05:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:21,308 INFO L87 Difference]: Start difference. First operand 57103 states and 134606 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:22,276 INFO L93 Difference]: Finished difference Result 67716 states and 158828 transitions. [2022-02-11 00:05:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:05:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:05:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:22,445 INFO L225 Difference]: With dead ends: 67716 [2022-02-11 00:05:22,445 INFO L226 Difference]: Without dead ends: 67716 [2022-02-11 00:05:22,446 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:05:22,446 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 115 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:22,446 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 78 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:22,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67716 states. [2022-02-11 00:05:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67716 to 66000. [2022-02-11 00:05:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.363353990211973) internal successors, (155979), 65999 states have internal predecessors, (155979), 0 states have call successors, (0), 0 states 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 00:05:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155979 transitions. [2022-02-11 00:05:23,989 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155979 transitions. Word has length 35 [2022-02-11 00:05:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:23,989 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155979 transitions. [2022-02-11 00:05:23,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155979 transitions. [2022-02-11 00:05:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:05:24,017 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:24,017 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:24,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:24,231 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,SelfDestructingSolverStorable47 [2022-02-11 00:05:24,232 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:24,232 INFO L85 PathProgramCache]: Analyzing trace with hash -682736063, now seen corresponding path program 39 times [2022-02-11 00:05:24,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:24,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622988250] [2022-02-11 00:05:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:24,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:24,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:24,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622988250] [2022-02-11 00:05:24,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622988250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:24,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37741246] [2022-02-11 00:05:24,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:24,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:24,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:24,258 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 00:05:24,260 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 00:05:24,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:05:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:24,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:05:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:24,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:24,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37741246] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:24,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:24,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:05:24,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305829178] [2022-02-11 00:05:24,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:24,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:05:24,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:05:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:05:24,382 INFO L87 Difference]: Start difference. First operand 66000 states and 155979 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:24,748 INFO L93 Difference]: Finished difference Result 68361 states and 159847 transitions. [2022-02-11 00:05:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:05:24,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:05:24,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:25,217 INFO L225 Difference]: With dead ends: 68361 [2022-02-11 00:05:25,218 INFO L226 Difference]: Without dead ends: 68358 [2022-02-11 00:05:25,218 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:05:25,218 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:25,218 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 93 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:05:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68358 states. [2022-02-11 00:05:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68358 to 66000. [2022-02-11 00:05:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.362596402975803) internal successors, (155929), 65999 states have internal predecessors, (155929), 0 states have call successors, (0), 0 states 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 00:05:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155929 transitions. [2022-02-11 00:05:26,752 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155929 transitions. Word has length 35 [2022-02-11 00:05:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:26,752 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155929 transitions. [2022-02-11 00:05:26,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155929 transitions. [2022-02-11 00:05:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:05:26,777 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:26,777 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:26,794 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 00:05:26,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:26,994 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:26,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:26,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1974658777, now seen corresponding path program 40 times [2022-02-11 00:05:26,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:26,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968228310] [2022-02-11 00:05:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:26,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:27,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:27,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968228310] [2022-02-11 00:05:27,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968228310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:27,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326306746] [2022-02-11 00:05:27,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:05:27,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:27,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:27,020 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 00:05:27,021 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 00:05:27,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:05:27,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:27,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:05:27,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:27,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:05:27,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326306746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:27,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:27,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-11 00:05:27,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939933674] [2022-02-11 00:05:27,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:27,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 00:05:27,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:27,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 00:05:27,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:05:27,162 INFO L87 Difference]: Start difference. First operand 66000 states and 155929 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:27,506 INFO L93 Difference]: Finished difference Result 68385 states and 159843 transitions. [2022-02-11 00:05:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:05:27,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:05:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:27,683 INFO L225 Difference]: With dead ends: 68385 [2022-02-11 00:05:27,683 INFO L226 Difference]: Without dead ends: 68373 [2022-02-11 00:05:27,683 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:05:27,684 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:27,684 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 106 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68373 states. [2022-02-11 00:05:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68373 to 66000. [2022-02-11 00:05:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66000 states, 65999 states have (on average 2.3606721313959302) internal successors, (155802), 65999 states have internal predecessors, (155802), 0 states have call successors, (0), 0 states 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 00:05:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66000 states to 66000 states and 155802 transitions. [2022-02-11 00:05:29,211 INFO L78 Accepts]: Start accepts. Automaton has 66000 states and 155802 transitions. Word has length 35 [2022-02-11 00:05:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:29,211 INFO L470 AbstractCegarLoop]: Abstraction has 66000 states and 155802 transitions. [2022-02-11 00:05:29,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 66000 states and 155802 transitions. [2022-02-11 00:05:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:05:29,235 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:29,235 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:29,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-11 00:05:29,452 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,SelfDestructingSolverStorable49 [2022-02-11 00:05:29,452 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 919304957, now seen corresponding path program 41 times [2022-02-11 00:05:29,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:29,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574093649] [2022-02-11 00:05:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:29,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:29,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574093649] [2022-02-11 00:05:29,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574093649] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:29,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356683854] [2022-02-11 00:05:29,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:05:29,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:29,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:29,482 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 00:05:29,483 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 00:05:29,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:05:29,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:29,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:05:29,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:29,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:05:29,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356683854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:29,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:29,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-11 00:05:29,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813605945] [2022-02-11 00:05:29,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:29,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:05:29,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:29,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:05:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:05:29,625 INFO L87 Difference]: Start difference. First operand 66000 states and 155802 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:30,260 INFO L93 Difference]: Finished difference Result 68349 states and 159650 transitions. [2022-02-11 00:05:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:05:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:05:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:30,438 INFO L225 Difference]: With dead ends: 68349 [2022-02-11 00:05:30,438 INFO L226 Difference]: Without dead ends: 68326 [2022-02-11 00:05:30,438 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:05:30,438 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:30,438 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 124 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:05:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68326 states. [2022-02-11 00:05:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68326 to 66018. [2022-02-11 00:05:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66018 states, 66017 states have (on average 2.3601799536483026) internal successors, (155812), 66017 states have internal predecessors, (155812), 0 states have call successors, (0), 0 states 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 00:05:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66018 states to 66018 states and 155812 transitions. [2022-02-11 00:05:32,017 INFO L78 Accepts]: Start accepts. Automaton has 66018 states and 155812 transitions. Word has length 35 [2022-02-11 00:05:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:32,017 INFO L470 AbstractCegarLoop]: Abstraction has 66018 states and 155812 transitions. [2022-02-11 00:05:32,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:05:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 66018 states and 155812 transitions. [2022-02-11 00:05:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:05:32,050 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:32,050 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:32,070 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 00:05:32,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:32,264 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077410, now seen corresponding path program 42 times [2022-02-11 00:05:32,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:32,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164828957] [2022-02-11 00:05:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:32,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:32,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164828957] [2022-02-11 00:05:32,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164828957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:32,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561008803] [2022-02-11 00:05:32,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:05:32,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:32,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:32,559 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 00:05:32,560 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 00:05:32,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:05:32,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:32,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:05:32,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:32,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:33,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561008803] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:33,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:33,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:05:33,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308210736] [2022-02-11 00:05:33,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:33,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:05:33,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:33,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:05:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:05:33,663 INFO L87 Difference]: Start difference. First operand 66018 states and 155812 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 00:05:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:36,795 INFO L93 Difference]: Finished difference Result 80160 states and 188249 transitions. [2022-02-11 00:05:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:05:36,795 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 38 [2022-02-11 00:05:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:37,045 INFO L225 Difference]: With dead ends: 80160 [2022-02-11 00:05:37,045 INFO L226 Difference]: Without dead ends: 80143 [2022-02-11 00:05:37,046 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=536, Invalid=5164, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:05:37,048 INFO L934 BasicCegarLoop]: 161 mSDtfsCounter, 470 mSDsluCounter, 2974 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:37,048 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 2724 Invalid, 2464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:05:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80143 states. [2022-02-11 00:05:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80143 to 68227. [2022-02-11 00:05:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68227 states, 68226 states have (on average 2.3634538152610443) internal successors, (161249), 68226 states have internal predecessors, (161249), 0 states have call successors, (0), 0 states 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 00:05:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68227 states to 68227 states and 161249 transitions. [2022-02-11 00:05:38,661 INFO L78 Accepts]: Start accepts. Automaton has 68227 states and 161249 transitions. Word has length 38 [2022-02-11 00:05:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:38,661 INFO L470 AbstractCegarLoop]: Abstraction has 68227 states and 161249 transitions. [2022-02-11 00:05:38,662 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 00:05:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 68227 states and 161249 transitions. [2022-02-11 00:05:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:05:38,694 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:38,694 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:38,712 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 00:05:38,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-11 00:05:38,909 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash 283993190, now seen corresponding path program 43 times [2022-02-11 00:05:38,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:38,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953855747] [2022-02-11 00:05:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:39,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:39,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953855747] [2022-02-11 00:05:39,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953855747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:39,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050732595] [2022-02-11 00:05:39,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:05:39,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:39,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:39,258 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 00:05:39,260 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 00:05:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:05:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:39,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:40,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050732595] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:40,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:40,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:05:40,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007158262] [2022-02-11 00:05:40,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:40,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:05:40,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:05:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:05:40,234 INFO L87 Difference]: Start difference. First operand 68227 states and 161249 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 00:05:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:42,356 INFO L93 Difference]: Finished difference Result 78845 states and 185508 transitions. [2022-02-11 00:05:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 00:05:42,357 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 38 [2022-02-11 00:05:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:42,531 INFO L225 Difference]: With dead ends: 78845 [2022-02-11 00:05:42,531 INFO L226 Difference]: Without dead ends: 78828 [2022-02-11 00:05:42,532 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=557, Invalid=4845, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:05:42,532 INFO L934 BasicCegarLoop]: 139 mSDtfsCounter, 425 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:42,533 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1778 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:05:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78828 states. [2022-02-11 00:05:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78828 to 69484. [2022-02-11 00:05:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69484 states, 69483 states have (on average 2.3646359541182735) internal successors, (164302), 69483 states have internal predecessors, (164302), 0 states have call successors, (0), 0 states 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 00:05:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69484 states to 69484 states and 164302 transitions. [2022-02-11 00:05:44,144 INFO L78 Accepts]: Start accepts. Automaton has 69484 states and 164302 transitions. Word has length 38 [2022-02-11 00:05:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:44,144 INFO L470 AbstractCegarLoop]: Abstraction has 69484 states and 164302 transitions. [2022-02-11 00:05:44,145 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 00:05:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 69484 states and 164302 transitions. [2022-02-11 00:05:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:05:44,179 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:44,179 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:44,203 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 00:05:44,395 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,SelfDestructingSolverStorable52 [2022-02-11 00:05:44,395 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2130240098, now seen corresponding path program 44 times [2022-02-11 00:05:44,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:44,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459993837] [2022-02-11 00:05:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:44,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:44,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:44,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459993837] [2022-02-11 00:05:44,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459993837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:44,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154557972] [2022-02-11 00:05:44,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:05:44,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:44,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:44,592 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 00:05:44,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:05:44,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:44,630 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 00:05:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:05:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:44,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:45,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154557972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:45,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:45,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:05:45,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144236262] [2022-02-11 00:05:45,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:45,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:05:45,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:45,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:05:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:05:45,352 INFO L87 Difference]: Start difference. First operand 69484 states and 164302 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 00:05:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:48,708 INFO L93 Difference]: Finished difference Result 80472 states and 189381 transitions. [2022-02-11 00:05:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 00:05:48,709 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 38 [2022-02-11 00:05:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:48,892 INFO L225 Difference]: With dead ends: 80472 [2022-02-11 00:05:48,892 INFO L226 Difference]: Without dead ends: 80455 [2022-02-11 00:05:48,893 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=798, Invalid=7758, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 00:05:48,893 INFO L934 BasicCegarLoop]: 165 mSDtfsCounter, 493 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:48,893 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 2387 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:05:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80455 states. [2022-02-11 00:05:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80455 to 73196. [2022-02-11 00:05:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73196 states, 73195 states have (on average 2.3706127467723204) internal successors, (173517), 73195 states have internal predecessors, (173517), 0 states have call successors, (0), 0 states 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 00:05:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73196 states to 73196 states and 173517 transitions. [2022-02-11 00:05:50,359 INFO L78 Accepts]: Start accepts. Automaton has 73196 states and 173517 transitions. Word has length 38 [2022-02-11 00:05:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:05:50,359 INFO L470 AbstractCegarLoop]: Abstraction has 73196 states and 173517 transitions. [2022-02-11 00:05:50,359 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 00:05:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 73196 states and 173517 transitions. [2022-02-11 00:05:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:05:50,390 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:05:50,390 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:05:50,406 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 00:05:50,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:50,595 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:05:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:05:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash 726839142, now seen corresponding path program 45 times [2022-02-11 00:05:50,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:05:50,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125995781] [2022-02-11 00:05:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:05:50,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:05:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:05:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:05:50,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:05:50,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125995781] [2022-02-11 00:05:50,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125995781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:05:50,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787189707] [2022-02-11 00:05:50,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:05:50,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:05:50,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:05:50,774 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 00:05:50,775 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 00:05:50,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:05:50,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:05:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:05:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:05:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:05:51,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:05:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:05:51,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787189707] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:05:51,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:05:51,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 33 [2022-02-11 00:05:51,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987372101] [2022-02-11 00:05:51,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:05:51,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:05:51,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:05:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:05:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:05:51,941 INFO L87 Difference]: Start difference. First operand 73196 states and 173517 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 00:05:58,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:05:58,066 INFO L93 Difference]: Finished difference Result 104966 states and 245995 transitions. [2022-02-11 00:05:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-11 00:05:58,067 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:05:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:05:58,357 INFO L225 Difference]: With dead ends: 104966 [2022-02-11 00:05:58,357 INFO L226 Difference]: Without dead ends: 104812 [2022-02-11 00:05:58,359 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9758 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2576, Invalid=26494, Unknown=0, NotChecked=0, Total=29070 [2022-02-11 00:05:58,359 INFO L934 BasicCegarLoop]: 178 mSDtfsCounter, 885 mSDsluCounter, 3649 mSDsCounter, 0 mSdLazyCounter, 3264 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:05:58,359 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 3414 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 3264 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:05:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104812 states. [2022-02-11 00:06:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104812 to 80383. [2022-02-11 00:06:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80383 states, 80382 states have (on average 2.3753949889278694) internal successors, (190939), 80382 states have internal predecessors, (190939), 0 states have call successors, (0), 0 states 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 00:06:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80383 states to 80383 states and 190939 transitions. [2022-02-11 00:06:00,386 INFO L78 Accepts]: Start accepts. Automaton has 80383 states and 190939 transitions. Word has length 38 [2022-02-11 00:06:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:00,386 INFO L470 AbstractCegarLoop]: Abstraction has 80383 states and 190939 transitions. [2022-02-11 00:06:00,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 00:06:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 80383 states and 190939 transitions. [2022-02-11 00:06:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:06:00,426 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:00,426 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:00,443 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 00:06:00,639 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,SelfDestructingSolverStorable54 [2022-02-11 00:06:00,639 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:06:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1924591970, now seen corresponding path program 46 times [2022-02-11 00:06:00,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:00,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116863557] [2022-02-11 00:06:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:00,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:00,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:00,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116863557] [2022-02-11 00:06:00,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116863557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:00,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993058396] [2022-02-11 00:06:00,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:06:00,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:00,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:00,833 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 00:06:00,834 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 00:06:00,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:06:00,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:00,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:06:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:01,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:01,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993058396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:01,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:01,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:06:01,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091494751] [2022-02-11 00:06:01,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:01,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:06:01,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:01,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:06:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:06:01,485 INFO L87 Difference]: Start difference. First operand 80383 states and 190939 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:04,554 INFO L93 Difference]: Finished difference Result 97594 states and 230104 transitions. [2022-02-11 00:06:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 00:06:04,555 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:06:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:04,765 INFO L225 Difference]: With dead ends: 97594 [2022-02-11 00:06:04,766 INFO L226 Difference]: Without dead ends: 97527 [2022-02-11 00:06:04,766 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=611, Invalid=6195, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 00:06:04,766 INFO L934 BasicCegarLoop]: 172 mSDtfsCounter, 371 mSDsluCounter, 2922 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2779 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:04,766 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 2779 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:06:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97527 states. [2022-02-11 00:06:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97527 to 84100. [2022-02-11 00:06:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84100 states, 84099 states have (on average 2.3742375057967395) internal successors, (199671), 84099 states have internal predecessors, (199671), 0 states have call successors, (0), 0 states 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 00:06:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84100 states to 84100 states and 199671 transitions. [2022-02-11 00:06:06,913 INFO L78 Accepts]: Start accepts. Automaton has 84100 states and 199671 transitions. Word has length 38 [2022-02-11 00:06:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:06,914 INFO L470 AbstractCegarLoop]: Abstraction has 84100 states and 199671 transitions. [2022-02-11 00:06:06,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:06:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 84100 states and 199671 transitions. [2022-02-11 00:06:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:06:06,953 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:06,954 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:06,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 00:06:07,168 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,SelfDestructingSolverStorable55 [2022-02-11 00:06:07,168 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:06:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:07,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1690483302, now seen corresponding path program 47 times [2022-02-11 00:06:07,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:07,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272699208] [2022-02-11 00:06:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:07,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:07,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:07,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272699208] [2022-02-11 00:06:07,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272699208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:07,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940327180] [2022-02-11 00:06:07,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:06:07,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:07,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:07,371 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 00:06:07,371 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 00:06:07,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-11 00:06:07,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:06:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:07,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:06:07,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940327180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:07,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:07,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 00:06:07,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872952113] [2022-02-11 00:06:07,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:07,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:06:07,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:06:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:06:08,000 INFO L87 Difference]: Start difference. First operand 84100 states and 199671 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 00:06:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:10,559 INFO L93 Difference]: Finished difference Result 105315 states and 248410 transitions. [2022-02-11 00:06:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 00:06:10,560 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 38 [2022-02-11 00:06:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:10,846 INFO L225 Difference]: With dead ends: 105315 [2022-02-11 00:06:10,847 INFO L226 Difference]: Without dead ends: 105242 [2022-02-11 00:06:10,847 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=656, Invalid=7000, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 00:06:10,848 INFO L934 BasicCegarLoop]: 198 mSDtfsCounter, 446 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:10,848 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 2833 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:06:11,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105242 states. [2022-02-11 00:06:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105242 to 89668. [2022-02-11 00:06:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89668 states, 89667 states have (on average 2.3797383652848874) internal successors, (213384), 89667 states have internal predecessors, (213384), 0 states have call successors, (0), 0 states 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 00:06:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89668 states to 89668 states and 213384 transitions. [2022-02-11 00:06:13,121 INFO L78 Accepts]: Start accepts. Automaton has 89668 states and 213384 transitions. Word has length 38 [2022-02-11 00:06:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:13,121 INFO L470 AbstractCegarLoop]: Abstraction has 89668 states and 213384 transitions. [2022-02-11 00:06:13,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 00:06:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 89668 states and 213384 transitions. [2022-02-11 00:06:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:06:13,156 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:13,156 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:13,173 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 00:06:13,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:13,373 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:06:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash -100519944, now seen corresponding path program 48 times [2022-02-11 00:06:13,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:13,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215714339] [2022-02-11 00:06:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:13,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:13,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215714339] [2022-02-11 00:06:13,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215714339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:13,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625864514] [2022-02-11 00:06:13,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:06:13,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:13,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:13,559 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 00:06:13,560 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 00:06:13,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-11 00:06:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:06:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:13,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:14,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625864514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:14,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:14,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:06:14,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675948665] [2022-02-11 00:06:14,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:14,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:06:14,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:06:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:06:14,204 INFO L87 Difference]: Start difference. First operand 89668 states and 213384 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 00:06:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:16,574 INFO L93 Difference]: Finished difference Result 105589 states and 250362 transitions. [2022-02-11 00:06:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 00:06:16,574 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 38 [2022-02-11 00:06:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:16,849 INFO L225 Difference]: With dead ends: 105589 [2022-02-11 00:06:16,849 INFO L226 Difference]: Without dead ends: 105572 [2022-02-11 00:06:16,849 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=650, Invalid=6156, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 00:06:16,850 INFO L934 BasicCegarLoop]: 130 mSDtfsCounter, 461 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:16,850 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1995 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:06:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105572 states. [2022-02-11 00:06:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105572 to 92721. [2022-02-11 00:06:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92721 states, 92720 states have (on average 2.3839516824849007) internal successors, (221040), 92720 states have internal predecessors, (221040), 0 states have call successors, (0), 0 states 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 00:06:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92721 states to 92721 states and 221040 transitions. [2022-02-11 00:06:18,847 INFO L78 Accepts]: Start accepts. Automaton has 92721 states and 221040 transitions. Word has length 38 [2022-02-11 00:06:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:18,847 INFO L470 AbstractCegarLoop]: Abstraction has 92721 states and 221040 transitions. [2022-02-11 00:06:18,847 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 00:06:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 92721 states and 221040 transitions. [2022-02-11 00:06:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:06:18,887 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:18,887 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:18,905 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 00:06:19,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:19,099 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:06:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:19,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1095467792, now seen corresponding path program 49 times [2022-02-11 00:06:19,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:19,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623439610] [2022-02-11 00:06:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:19,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:19,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:19,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623439610] [2022-02-11 00:06:19,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623439610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:19,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520843852] [2022-02-11 00:06:19,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:06:19,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:19,364 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 00:06:19,391 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 00:06:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:06:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:20,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:20,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520843852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:20,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:20,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:06:20,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590188063] [2022-02-11 00:06:20,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:20,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:06:20,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:20,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:06:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:06:20,393 INFO L87 Difference]: Start difference. First operand 92721 states and 221040 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 00:06:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:22,553 INFO L93 Difference]: Finished difference Result 105951 states and 251639 transitions. [2022-02-11 00:06:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:06:22,553 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 38 [2022-02-11 00:06:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:22,903 INFO L225 Difference]: With dead ends: 105951 [2022-02-11 00:06:22,904 INFO L226 Difference]: Without dead ends: 105934 [2022-02-11 00:06:22,904 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=3524, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:06:22,904 INFO L934 BasicCegarLoop]: 133 mSDtfsCounter, 302 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:22,904 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 2131 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:06:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105934 states. [2022-02-11 00:06:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105934 to 94088. [2022-02-11 00:06:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94088 states, 94087 states have (on average 2.384527086632585) internal successors, (224353), 94087 states have internal predecessors, (224353), 0 states have call successors, (0), 0 states 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 00:06:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94088 states to 94088 states and 224353 transitions. [2022-02-11 00:06:25,015 INFO L78 Accepts]: Start accepts. Automaton has 94088 states and 224353 transitions. Word has length 38 [2022-02-11 00:06:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:25,016 INFO L470 AbstractCegarLoop]: Abstraction has 94088 states and 224353 transitions. [2022-02-11 00:06:25,016 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 00:06:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 94088 states and 224353 transitions. [2022-02-11 00:06:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:06:25,059 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:25,059 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:25,076 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 00:06:25,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:25,275 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:06:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1318765496, now seen corresponding path program 50 times [2022-02-11 00:06:25,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:25,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617483314] [2022-02-11 00:06:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:25,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:25,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:25,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617483314] [2022-02-11 00:06:25,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617483314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:25,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435362128] [2022-02-11 00:06:25,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:06:25,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:25,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:25,460 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 00:06:25,461 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 00:06:25,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:06:25,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:25,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:06:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:25,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:26,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435362128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:26,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:26,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:06:26,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828801997] [2022-02-11 00:06:26,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:26,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:06:26,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:06:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:06:26,153 INFO L87 Difference]: Start difference. First operand 94088 states and 224353 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 00:06:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:28,859 INFO L93 Difference]: Finished difference Result 104357 states and 247663 transitions. [2022-02-11 00:06:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-11 00:06:28,859 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 38 [2022-02-11 00:06:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:29,094 INFO L225 Difference]: With dead ends: 104357 [2022-02-11 00:06:29,094 INFO L226 Difference]: Without dead ends: 104340 [2022-02-11 00:06:29,095 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=590, Invalid=6052, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 00:06:29,095 INFO L934 BasicCegarLoop]: 168 mSDtfsCounter, 354 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:29,095 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 2185 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:06:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104340 states. [2022-02-11 00:06:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104340 to 96779. [2022-02-11 00:06:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96779 states, 96778 states have (on average 2.3871231064911447) internal successors, (231021), 96778 states have internal predecessors, (231021), 0 states have call successors, (0), 0 states 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 00:06:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96779 states to 96779 states and 231021 transitions. [2022-02-11 00:06:31,173 INFO L78 Accepts]: Start accepts. Automaton has 96779 states and 231021 transitions. Word has length 38 [2022-02-11 00:06:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:31,173 INFO L470 AbstractCegarLoop]: Abstraction has 96779 states and 231021 transitions. [2022-02-11 00:06:31,174 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 00:06:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 96779 states and 231021 transitions. [2022-02-11 00:06:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:06:31,224 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:31,224 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:31,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-11 00:06:31,437 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,SelfDestructingSolverStorable59 [2022-02-11 00:06:31,438 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:06:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:31,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1793009392, now seen corresponding path program 51 times [2022-02-11 00:06:31,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:31,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489681769] [2022-02-11 00:06:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:31,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:31,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:31,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489681769] [2022-02-11 00:06:31,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489681769] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:31,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276750695] [2022-02-11 00:06:31,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:06:31,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:31,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:31,609 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 00:06:31,610 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 00:06:31,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-11 00:06:31,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:06:31,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:31,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:32,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276750695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:32,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:32,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2022-02-11 00:06:32,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175671857] [2022-02-11 00:06:32,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:32,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:06:32,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:32,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:06:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:06:32,412 INFO L87 Difference]: Start difference. First operand 96779 states and 231021 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 00:06:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:41,871 INFO L93 Difference]: Finished difference Result 247727 states and 589278 transitions. [2022-02-11 00:06:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-02-11 00:06:41,871 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:06:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:42,864 INFO L225 Difference]: With dead ends: 247727 [2022-02-11 00:06:42,864 INFO L226 Difference]: Without dead ends: 247520 [2022-02-11 00:06:42,866 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14609 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3852, Invalid=37968, Unknown=0, NotChecked=0, Total=41820 [2022-02-11 00:06:42,866 INFO L934 BasicCegarLoop]: 275 mSDtfsCounter, 840 mSDsluCounter, 5338 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 5091 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:42,866 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 5091 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 4552 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 00:06:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247520 states. [2022-02-11 00:06:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247520 to 197497. [2022-02-11 00:06:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197497 states, 197496 states have (on average 2.411436180985944) internal successors, (476249), 197496 states have internal predecessors, (476249), 0 states have call successors, (0), 0 states 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 00:06:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197497 states to 197497 states and 476249 transitions. [2022-02-11 00:06:48,438 INFO L78 Accepts]: Start accepts. Automaton has 197497 states and 476249 transitions. Word has length 38 [2022-02-11 00:06:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:48,438 INFO L470 AbstractCegarLoop]: Abstraction has 197497 states and 476249 transitions. [2022-02-11 00:06:48,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 00:06:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 197497 states and 476249 transitions. [2022-02-11 00:06:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:06:48,492 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:48,492 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:48,509 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 00:06:48,698 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,SelfDestructingSolverStorable60 [2022-02-11 00:06:48,699 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:06:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:48,699 INFO L85 PathProgramCache]: Analyzing trace with hash 710954658, now seen corresponding path program 52 times [2022-02-11 00:06:48,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:48,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977227824] [2022-02-11 00:06:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:48,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:48,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977227824] [2022-02-11 00:06:48,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977227824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:48,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296894282] [2022-02-11 00:06:48,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:06:48,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:48,963 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 00:06:48,965 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 00:06:49,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:06:49,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:06:49,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:06:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:49,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:06:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:06:49,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296894282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:06:49,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:06:49,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:06:49,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137685879] [2022-02-11 00:06:49,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:06:49,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:06:49,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:06:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:06:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:06:49,606 INFO L87 Difference]: Start difference. First operand 197497 states and 476249 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 00:06:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:06:52,895 INFO L93 Difference]: Finished difference Result 222369 states and 534084 transitions. [2022-02-11 00:06:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:06:52,895 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 38 [2022-02-11 00:06:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:06:53,912 INFO L225 Difference]: With dead ends: 222369 [2022-02-11 00:06:53,912 INFO L226 Difference]: Without dead ends: 222352 [2022-02-11 00:06:53,913 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=434, Invalid=4258, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:06:53,913 INFO L934 BasicCegarLoop]: 124 mSDtfsCounter, 380 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:06:53,913 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 1912 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:06:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222352 states. [2022-02-11 00:06:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222352 to 199729. [2022-02-11 00:06:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199729 states, 199728 states have (on average 2.412170551950653) internal successors, (481778), 199728 states have internal predecessors, (481778), 0 states have call successors, (0), 0 states 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 00:06:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199729 states to 199729 states and 481778 transitions. [2022-02-11 00:06:59,400 INFO L78 Accepts]: Start accepts. Automaton has 199729 states and 481778 transitions. Word has length 38 [2022-02-11 00:06:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:06:59,400 INFO L470 AbstractCegarLoop]: Abstraction has 199729 states and 481778 transitions. [2022-02-11 00:06:59,400 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 00:06:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 199729 states and 481778 transitions. [2022-02-11 00:06:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:06:59,451 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:06:59,451 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:06:59,468 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 00:06:59,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-11 00:06:59,667 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:06:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:06:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 432482470, now seen corresponding path program 53 times [2022-02-11 00:06:59,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:06:59,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458562847] [2022-02-11 00:06:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:06:59,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:06:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:06:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:06:59,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:06:59,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458562847] [2022-02-11 00:06:59,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458562847] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:06:59,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964135541] [2022-02-11 00:06:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:06:59,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:06:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:06:59,857 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 00:06:59,858 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 00:06:59,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 00:06:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:06:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:06:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:07:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:00,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:07:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:00,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964135541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:07:00,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:07:00,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:07:00,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650758974] [2022-02-11 00:07:00,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:07:00,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 00:07:00,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:07:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 00:07:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:07:00,691 INFO L87 Difference]: Start difference. First operand 199729 states and 481778 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 00:07:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:07:04,732 INFO L93 Difference]: Finished difference Result 250125 states and 598297 transitions. [2022-02-11 00:07:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-11 00:07:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:07:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:07:05,847 INFO L225 Difference]: With dead ends: 250125 [2022-02-11 00:07:05,847 INFO L226 Difference]: Without dead ends: 249693 [2022-02-11 00:07:05,847 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1466, Invalid=9664, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 00:07:05,847 INFO L934 BasicCegarLoop]: 146 mSDtfsCounter, 719 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2679 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:07:05,849 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 2847 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2679 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:07:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249693 states. [2022-02-11 00:07:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249693 to 204883. [2022-02-11 00:07:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204883 states, 204882 states have (on average 2.410118995324138) internal successors, (493790), 204882 states have internal predecessors, (493790), 0 states have call successors, (0), 0 states 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 00:07:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204883 states to 204883 states and 493790 transitions. [2022-02-11 00:07:12,158 INFO L78 Accepts]: Start accepts. Automaton has 204883 states and 493790 transitions. Word has length 38 [2022-02-11 00:07:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:07:12,158 INFO L470 AbstractCegarLoop]: Abstraction has 204883 states and 493790 transitions. [2022-02-11 00:07:12,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 00:07:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 204883 states and 493790 transitions. [2022-02-11 00:07:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:07:12,224 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:07:12,224 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:07:12,240 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 00:07:12,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:12,440 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:07:12,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:07:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1005405586, now seen corresponding path program 54 times [2022-02-11 00:07:12,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:07:12,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567346576] [2022-02-11 00:07:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:07:12,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:07:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:07:12,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:07:12,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567346576] [2022-02-11 00:07:12,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567346576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:07:12,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141690818] [2022-02-11 00:07:12,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:07:12,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:07:12,613 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 00:07:12,614 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 00:07:12,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:07:12,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:07:12,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:07:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:07:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:12,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:07:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:13,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141690818] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:07:13,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:07:13,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:07:13,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500740532] [2022-02-11 00:07:13,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:07:13,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:07:13,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:07:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:07:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:07:13,764 INFO L87 Difference]: Start difference. First operand 204883 states and 493790 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 00:07:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:07:16,639 INFO L93 Difference]: Finished difference Result 217189 states and 522887 transitions. [2022-02-11 00:07:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:07:16,640 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 38 [2022-02-11 00:07:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:07:17,742 INFO L225 Difference]: With dead ends: 217189 [2022-02-11 00:07:17,742 INFO L226 Difference]: Without dead ends: 217155 [2022-02-11 00:07:17,743 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:07:17,743 INFO L934 BasicCegarLoop]: 94 mSDtfsCounter, 315 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:07:17,750 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1564 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:07:17,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217155 states. [2022-02-11 00:07:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217155 to 205752. [2022-02-11 00:07:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205752 states, 205751 states have (on average 2.4099761362034693) internal successors, (495855), 205751 states have internal predecessors, (495855), 0 states have call successors, (0), 0 states 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 00:07:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205752 states to 205752 states and 495855 transitions. [2022-02-11 00:07:23,075 INFO L78 Accepts]: Start accepts. Automaton has 205752 states and 495855 transitions. Word has length 38 [2022-02-11 00:07:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:07:23,076 INFO L470 AbstractCegarLoop]: Abstraction has 205752 states and 495855 transitions. [2022-02-11 00:07:23,076 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 00:07:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 205752 states and 495855 transitions. [2022-02-11 00:07:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:07:23,604 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:07:23,604 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:07:23,620 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 00:07:23,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:23,820 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:07:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:07:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash -41761426, now seen corresponding path program 55 times [2022-02-11 00:07:23,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:07:23,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2213902] [2022-02-11 00:07:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:07:23,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:07:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:07:24,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:07:24,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2213902] [2022-02-11 00:07:24,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2213902] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:07:24,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21054505] [2022-02-11 00:07:24,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:07:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:07:24,014 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 00:07:24,015 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 00:07:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:07:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:07:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:07:24,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:07:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:07:24,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21054505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:07:24,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:07:24,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 00:07:24,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455266530] [2022-02-11 00:07:24,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:07:24,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:07:24,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:07:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:07:24,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:07:24,711 INFO L87 Difference]: Start difference. First operand 205752 states and 495855 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 00:07:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:07:28,193 INFO L93 Difference]: Finished difference Result 243037 states and 582553 transitions. [2022-02-11 00:07:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 00:07:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 38 [2022-02-11 00:07:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:07:28,923 INFO L225 Difference]: With dead ends: 243037 [2022-02-11 00:07:28,923 INFO L226 Difference]: Without dead ends: 242968 [2022-02-11 00:07:28,923 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=452, Invalid=4660, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:07:28,923 INFO L934 BasicCegarLoop]: 108 mSDtfsCounter, 374 mSDsluCounter, 2410 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:07:28,924 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2133 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:07:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242968 states. [2022-02-11 00:07:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242968 to 214523. [2022-02-11 00:07:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214523 states, 214522 states have (on average 2.411393703209927) internal successors, (517297), 214522 states have internal predecessors, (517297), 0 states have call successors, (0), 0 states 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 00:07:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214523 states to 214523 states and 517297 transitions. [2022-02-11 00:07:35,027 INFO L78 Accepts]: Start accepts. Automaton has 214523 states and 517297 transitions. Word has length 38 [2022-02-11 00:07:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:07:35,028 INFO L470 AbstractCegarLoop]: Abstraction has 214523 states and 517297 transitions. [2022-02-11 00:07:35,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 00:07:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 214523 states and 517297 transitions. [2022-02-11 00:07:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:07:35,085 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:07:35,085 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:07:35,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-11 00:07:35,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 00:07:35,302 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:07:35,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:07:35,302 INFO L85 PathProgramCache]: Analyzing trace with hash 253122132, now seen corresponding path program 56 times [2022-02-11 00:07:35,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:07:35,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751167054] [2022-02-11 00:07:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:07:35,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:07:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:07:35,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:07:35,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751167054] [2022-02-11 00:07:35,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751167054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:07:35,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041350250] [2022-02-11 00:07:35,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:07:35,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:35,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:07:35,507 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 00:07:35,508 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 00:07:35,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:07:35,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:07:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:07:35,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:07:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:35,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:07:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:36,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041350250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:07:36,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:07:36,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:07:36,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133624268] [2022-02-11 00:07:36,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:07:36,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:07:36,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:07:36,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:07:36,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:07:36,211 INFO L87 Difference]: Start difference. First operand 214523 states and 517297 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 00:07:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:07:38,943 INFO L93 Difference]: Finished difference Result 238695 states and 573579 transitions. [2022-02-11 00:07:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:07:38,959 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 38 [2022-02-11 00:07:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:07:39,925 INFO L225 Difference]: With dead ends: 238695 [2022-02-11 00:07:39,925 INFO L226 Difference]: Without dead ends: 238678 [2022-02-11 00:07:39,926 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:07:39,926 INFO L934 BasicCegarLoop]: 89 mSDtfsCounter, 210 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:07:39,927 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1664 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:07:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238678 states. [2022-02-11 00:07:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238678 to 214859. [2022-02-11 00:07:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214859 states, 214858 states have (on average 2.4113879864840966) internal successors, (518106), 214858 states have internal predecessors, (518106), 0 states have call successors, (0), 0 states 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 00:07:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214859 states to 214859 states and 518106 transitions. [2022-02-11 00:07:45,664 INFO L78 Accepts]: Start accepts. Automaton has 214859 states and 518106 transitions. Word has length 38 [2022-02-11 00:07:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:07:45,665 INFO L470 AbstractCegarLoop]: Abstraction has 214859 states and 518106 transitions. [2022-02-11 00:07:45,665 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 00:07:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 214859 states and 518106 transitions. [2022-02-11 00:07:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:07:45,721 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:07:45,722 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:07:45,744 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 00:07:45,944 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,SelfDestructingSolverStorable65 [2022-02-11 00:07:45,945 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:07:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:07:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1725520592, now seen corresponding path program 57 times [2022-02-11 00:07:45,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:07:45,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560643041] [2022-02-11 00:07:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:07:45,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:07:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:07:46,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:07:46,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560643041] [2022-02-11 00:07:46,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560643041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:07:46,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124814337] [2022-02-11 00:07:46,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:07:46,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:07:46,196 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 00:07:46,202 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 00:07:46,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:07:46,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:07:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:07:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:07:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:47,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:07:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:47,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124814337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:07:47,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:07:47,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:07:47,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564714186] [2022-02-11 00:07:47,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:07:47,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:07:47,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:07:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:07:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:07:47,407 INFO L87 Difference]: Start difference. First operand 214859 states and 518106 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 00:07:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:07:50,419 INFO L93 Difference]: Finished difference Result 219835 states and 529343 transitions. [2022-02-11 00:07:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 00:07:50,420 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 38 [2022-02-11 00:07:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:07:51,385 INFO L225 Difference]: With dead ends: 219835 [2022-02-11 00:07:51,386 INFO L226 Difference]: Without dead ends: 219791 [2022-02-11 00:07:51,386 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=535, Invalid=5015, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:07:51,388 INFO L934 BasicCegarLoop]: 135 mSDtfsCounter, 391 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:07:51,388 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 2059 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:07:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219791 states. [2022-02-11 00:07:56,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219791 to 216583. [2022-02-11 00:07:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216583 states, 216582 states have (on average 2.4118116925690964) internal successors, (522355), 216582 states have internal predecessors, (522355), 0 states have call successors, (0), 0 states 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 00:07:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216583 states to 216583 states and 522355 transitions. [2022-02-11 00:07:57,534 INFO L78 Accepts]: Start accepts. Automaton has 216583 states and 522355 transitions. Word has length 38 [2022-02-11 00:07:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:07:57,534 INFO L470 AbstractCegarLoop]: Abstraction has 216583 states and 522355 transitions. [2022-02-11 00:07:57,534 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 00:07:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 216583 states and 522355 transitions. [2022-02-11 00:07:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:07:57,588 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:07:57,588 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:07:57,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-11 00:07:57,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:57,791 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:07:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:07:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash -925910520, now seen corresponding path program 58 times [2022-02-11 00:07:57,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:07:57,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331208340] [2022-02-11 00:07:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:07:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:07:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:07:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:07:57,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:07:57,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331208340] [2022-02-11 00:07:57,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331208340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:07:57,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466764841] [2022-02-11 00:07:57,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:07:57,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:07:57,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:07:57,987 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 00:07:57,988 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 00:07:58,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:07:58,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:07:58,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:07:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:07:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:58,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:07:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:07:58,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466764841] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:07:58,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:07:58,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:07:58,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166941118] [2022-02-11 00:07:58,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:07:58,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:07:58,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:07:58,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:07:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:07:58,696 INFO L87 Difference]: Start difference. First operand 216583 states and 522355 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:08:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:08:01,863 INFO L93 Difference]: Finished difference Result 221841 states and 533914 transitions. [2022-02-11 00:08:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:08:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:08:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:08:02,580 INFO L225 Difference]: With dead ends: 221841 [2022-02-11 00:08:02,580 INFO L226 Difference]: Without dead ends: 221758 [2022-02-11 00:08:02,580 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=485, Invalid=4485, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:08:02,581 INFO L934 BasicCegarLoop]: 127 mSDtfsCounter, 401 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:08:02,581 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 1989 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:08:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221758 states. [2022-02-11 00:08:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221758 to 219330. [2022-02-11 00:08:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219330 states, 219329 states have (on average 2.410378928459073) internal successors, (528666), 219329 states have internal predecessors, (528666), 0 states have call successors, (0), 0 states 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 00:08:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219330 states to 219330 states and 528666 transitions. [2022-02-11 00:08:08,340 INFO L78 Accepts]: Start accepts. Automaton has 219330 states and 528666 transitions. Word has length 38 [2022-02-11 00:08:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:08:08,340 INFO L470 AbstractCegarLoop]: Abstraction has 219330 states and 528666 transitions. [2022-02-11 00:08:08,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:08:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 219330 states and 528666 transitions. [2022-02-11 00:08:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:08:08,394 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:08:08,394 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:08:08,413 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 00:08:08,610 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,SelfDestructingSolverStorable67 [2022-02-11 00:08:08,611 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:08:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:08:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1421707574, now seen corresponding path program 59 times [2022-02-11 00:08:08,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:08:08,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252398849] [2022-02-11 00:08:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:08:08,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:08:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:08:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:08:08,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:08:08,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252398849] [2022-02-11 00:08:08,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252398849] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:08:08,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709884144] [2022-02-11 00:08:08,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:08:08,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:08:08,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:08:08,818 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 00:08:08,839 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 00:08:08,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 00:08:08,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:08:08,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:08:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:08:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:08:09,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:08:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:08:09,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709884144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:08:09,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:08:09,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 00:08:09,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125463272] [2022-02-11 00:08:09,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:08:09,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:08:09,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:08:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:08:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:08:09,534 INFO L87 Difference]: Start difference. First operand 219330 states and 528666 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:08:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:08:12,609 INFO L93 Difference]: Finished difference Result 226504 states and 544989 transitions. [2022-02-11 00:08:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:08:12,609 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:08:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:08:13,274 INFO L225 Difference]: With dead ends: 226504 [2022-02-11 00:08:13,275 INFO L226 Difference]: Without dead ends: 226451 [2022-02-11 00:08:13,276 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:08:13,276 INFO L934 BasicCegarLoop]: 99 mSDtfsCounter, 395 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:08:13,276 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1723 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1911 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:08:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226451 states. [2022-02-11 00:08:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226451 to 223614. [2022-02-11 00:08:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223614 states, 223613 states have (on average 2.409850947842925) internal successors, (538874), 223613 states have internal predecessors, (538874), 0 states have call successors, (0), 0 states 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 00:08:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223614 states to 223614 states and 538874 transitions. [2022-02-11 00:08:19,573 INFO L78 Accepts]: Start accepts. Automaton has 223614 states and 538874 transitions. Word has length 38 [2022-02-11 00:08:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:08:19,573 INFO L470 AbstractCegarLoop]: Abstraction has 223614 states and 538874 transitions. [2022-02-11 00:08:19,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:08:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 223614 states and 538874 transitions. [2022-02-11 00:08:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:08:19,633 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:08:19,633 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:08:19,663 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 00:08:19,847 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,SelfDestructingSolverStorable68 [2022-02-11 00:08:19,848 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:08:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:08:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash -198181364, now seen corresponding path program 60 times [2022-02-11 00:08:19,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:08:19,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750249778] [2022-02-11 00:08:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:08:19,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:08:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:08:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:08:20,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:08:20,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750249778] [2022-02-11 00:08:20,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750249778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:08:20,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212675555] [2022-02-11 00:08:20,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:08:20,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:08:20,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:08:20,116 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 00:08:20,163 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 00:08:20,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:08:20,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:08:20,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:08:20,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:08:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:08:20,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:08:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:08:20,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212675555] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:08:20,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:08:20,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-02-11 00:08:20,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110094991] [2022-02-11 00:08:20,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:08:20,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:08:20,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:08:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:08:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:08:20,751 INFO L87 Difference]: Start difference. First operand 223614 states and 538874 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:08:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:08:24,044 INFO L93 Difference]: Finished difference Result 240724 states and 577550 transitions. [2022-02-11 00:08:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:08:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:08:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:08:24,920 INFO L225 Difference]: With dead ends: 240724 [2022-02-11 00:08:24,920 INFO L226 Difference]: Without dead ends: 240666 [2022-02-11 00:08:24,921 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:08:24,921 INFO L934 BasicCegarLoop]: 149 mSDtfsCounter, 322 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:08:24,921 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 2362 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:08:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240666 states. [2022-02-11 00:08:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240666 to 225813. [2022-02-11 00:08:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225813 states, 225812 states have (on average 2.4096505057304305) internal successors, (544128), 225812 states have internal predecessors, (544128), 0 states have call successors, (0), 0 states 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 00:08:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225813 states to 225813 states and 544128 transitions. [2022-02-11 00:08:30,872 INFO L78 Accepts]: Start accepts. Automaton has 225813 states and 544128 transitions. Word has length 38 [2022-02-11 00:08:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:08:30,872 INFO L470 AbstractCegarLoop]: Abstraction has 225813 states and 544128 transitions. [2022-02-11 00:08:30,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:08:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 225813 states and 544128 transitions. [2022-02-11 00:08:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:08:30,927 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:08:30,927 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:08:30,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-11 00:08:31,139 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,SelfDestructingSolverStorable69 [2022-02-11 00:08:31,140 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:08:31,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:08:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1452833468, now seen corresponding path program 61 times [2022-02-11 00:08:31,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:08:31,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344277533] [2022-02-11 00:08:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:08:31,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:08:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:08:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:08:31,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:08:31,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344277533] [2022-02-11 00:08:31,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344277533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:08:31,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869441394] [2022-02-11 00:08:31,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:08:31,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:08:31,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:08:31,333 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 00:08:31,335 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 00:08:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:08:31,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:08:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:08:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:08:31,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:08:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:08:32,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869441394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:08:32,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:08:32,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-02-11 00:08:32,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227212367] [2022-02-11 00:08:32,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:08:32,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:08:32,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:08:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:08:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:08:32,005 INFO L87 Difference]: Start difference. First operand 225813 states and 544128 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 00:08:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:08:35,191 INFO L93 Difference]: Finished difference Result 253210 states and 606499 transitions. [2022-02-11 00:08:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:08:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 38 [2022-02-11 00:08:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:08:36,069 INFO L225 Difference]: With dead ends: 253210 [2022-02-11 00:08:36,069 INFO L226 Difference]: Without dead ends: 253105 [2022-02-11 00:08:36,069 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=402, Invalid=3630, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:08:36,070 INFO L934 BasicCegarLoop]: 142 mSDtfsCounter, 386 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:08:36,070 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2142 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:08:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253105 states. [2022-02-11 00:08:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253105 to 232783. [2022-02-11 00:08:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232783 states, 232782 states have (on average 2.4071491782010637) internal successors, (560341), 232782 states have internal predecessors, (560341), 0 states have call successors, (0), 0 states 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 00:08:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232783 states to 232783 states and 560341 transitions. [2022-02-11 00:08:42,206 INFO L78 Accepts]: Start accepts. Automaton has 232783 states and 560341 transitions. Word has length 38 [2022-02-11 00:08:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:08:42,206 INFO L470 AbstractCegarLoop]: Abstraction has 232783 states and 560341 transitions. [2022-02-11 00:08:42,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 00:08:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 232783 states and 560341 transitions. [2022-02-11 00:08:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:08:42,262 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:08:42,262 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:08:42,279 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 00:08:42,475 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,SelfDestructingSolverStorable70 [2022-02-11 00:08:42,475 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:08:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:08:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 679972510, now seen corresponding path program 62 times [2022-02-11 00:08:42,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:08:42,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417810705] [2022-02-11 00:08:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:08:42,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:08:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:08:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:08:42,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:08:42,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417810705] [2022-02-11 00:08:42,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417810705] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:08:42,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919472995] [2022-02-11 00:08:42,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:08:42,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:08:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:08:42,693 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 00:08:42,694 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 00:08:42,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:08:42,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:08:42,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:08:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:08:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:08:43,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:08:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:08:43,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919472995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:08:43,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:08:43,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-02-11 00:08:43,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305912556] [2022-02-11 00:08:43,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:08:43,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:08:43,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:08:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:08:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:08:43,499 INFO L87 Difference]: Start difference. First operand 232783 states and 560341 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 00:08:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:08:47,520 INFO L93 Difference]: Finished difference Result 257718 states and 616884 transitions. [2022-02-11 00:08:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:08:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 38 [2022-02-11 00:08:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:08:48,784 INFO L225 Difference]: With dead ends: 257718 [2022-02-11 00:08:48,785 INFO L226 Difference]: Without dead ends: 257623 [2022-02-11 00:08:48,785 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=369, Invalid=3537, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:08:48,785 INFO L934 BasicCegarLoop]: 180 mSDtfsCounter, 362 mSDsluCounter, 3066 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:08:48,785 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2801 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 00:08:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257623 states. [2022-02-11 00:08:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257623 to 238428. [2022-02-11 00:08:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238428 states, 238427 states have (on average 2.406254325223234) internal successors, (573716), 238427 states have internal predecessors, (573716), 0 states have call successors, (0), 0 states 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 00:08:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238428 states to 238428 states and 573716 transitions. [2022-02-11 00:08:56,841 INFO L78 Accepts]: Start accepts. Automaton has 238428 states and 573716 transitions. Word has length 38 [2022-02-11 00:08:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:08:56,841 INFO L470 AbstractCegarLoop]: Abstraction has 238428 states and 573716 transitions. [2022-02-11 00:08:56,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 00:08:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 238428 states and 573716 transitions. [2022-02-11 00:08:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:08:56,922 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:08:56,922 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:08:56,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-11 00:08:57,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:08:57,140 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:08:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:08:57,140 INFO L85 PathProgramCache]: Analyzing trace with hash 442535240, now seen corresponding path program 63 times [2022-02-11 00:08:57,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:08:57,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378745874] [2022-02-11 00:08:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:08:57,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:08:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:08:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:08:57,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:08:57,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378745874] [2022-02-11 00:08:57,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378745874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:08:57,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797110844] [2022-02-11 00:08:57,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:08:57,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:08:57,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:08:57,480 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:08:57,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 00:08:57,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-11 00:08:57,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:08:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:08:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:08:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:08:58,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:08:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:08:58,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797110844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:08:58,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:08:58,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-11 00:08:58,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728084878] [2022-02-11 00:08:58,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:08:58,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 00:08:58,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:08:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 00:08:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:08:58,992 INFO L87 Difference]: Start difference. First operand 238428 states and 573716 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 00:09:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:09:03,802 INFO L93 Difference]: Finished difference Result 247178 states and 593496 transitions. [2022-02-11 00:09:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 00:09:03,802 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:09:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:09:04,994 INFO L225 Difference]: With dead ends: 247178 [2022-02-11 00:09:04,995 INFO L226 Difference]: Without dead ends: 247092 [2022-02-11 00:09:04,995 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=649, Invalid=6157, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 00:09:04,995 INFO L934 BasicCegarLoop]: 142 mSDtfsCounter, 600 mSDsluCounter, 2932 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:09:04,996 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 2475 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2383 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:09:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247092 states. [2022-02-11 00:09:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247092 to 242549. [2022-02-11 00:09:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242549 states, 242548 states have (on average 2.4067318633837425) internal successors, (583748), 242548 states have internal predecessors, (583748), 0 states have call successors, (0), 0 states 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 00:09:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242549 states to 242549 states and 583748 transitions. [2022-02-11 00:09:13,590 INFO L78 Accepts]: Start accepts. Automaton has 242549 states and 583748 transitions. Word has length 38 [2022-02-11 00:09:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:09:13,590 INFO L470 AbstractCegarLoop]: Abstraction has 242549 states and 583748 transitions. [2022-02-11 00:09:13,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 00:09:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 242549 states and 583748 transitions. [2022-02-11 00:09:13,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:09:13,658 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:09:13,659 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:09:13,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-11 00:09:13,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:09:13,879 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:09:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:09:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1936505558, now seen corresponding path program 64 times [2022-02-11 00:09:13,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:09:13,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708580054] [2022-02-11 00:09:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:09:13,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:09:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:09:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:09:14,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:09:14,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708580054] [2022-02-11 00:09:14,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708580054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:09:14,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603919832] [2022-02-11 00:09:14,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:09:14,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:09:14,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:09:14,134 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:09:14,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 00:09:14,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:09:14,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:09:14,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:09:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:09:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:09:14,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:09:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:09:14,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603919832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:09:14,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:09:14,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-02-11 00:09:14,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865411357] [2022-02-11 00:09:14,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:09:14,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:09:14,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:09:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:09:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:09:14,900 INFO L87 Difference]: Start difference. First operand 242549 states and 583748 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 00:09:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:09:18,369 INFO L93 Difference]: Finished difference Result 259471 states and 621961 transitions. [2022-02-11 00:09:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:09:18,370 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:09:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:09:19,793 INFO L225 Difference]: With dead ends: 259471 [2022-02-11 00:09:19,794 INFO L226 Difference]: Without dead ends: 259425 [2022-02-11 00:09:19,794 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=297, Invalid=2565, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:09:19,794 INFO L934 BasicCegarLoop]: 115 mSDtfsCounter, 272 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:09:19,794 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1824 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:09:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259425 states. [2022-02-11 00:09:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259425 to 244014. [2022-02-11 00:09:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244014 states, 244013 states have (on average 2.4064332638015187) internal successors, (587201), 244013 states have internal predecessors, (587201), 0 states have call successors, (0), 0 states 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 00:09:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244014 states to 244014 states and 587201 transitions. [2022-02-11 00:09:27,194 INFO L78 Accepts]: Start accepts. Automaton has 244014 states and 587201 transitions. Word has length 38 [2022-02-11 00:09:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:09:27,194 INFO L470 AbstractCegarLoop]: Abstraction has 244014 states and 587201 transitions. [2022-02-11 00:09:27,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 00:09:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 244014 states and 587201 transitions. [2022-02-11 00:09:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:09:27,276 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:09:27,276 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:09:27,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-11 00:09:27,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:09:27,492 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:09:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:09:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash 423917610, now seen corresponding path program 65 times [2022-02-11 00:09:27,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:09:27,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508862681] [2022-02-11 00:09:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:09:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:09:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:09:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:09:27,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:09:27,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508862681] [2022-02-11 00:09:27,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508862681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:09:27,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19976549] [2022-02-11 00:09:27,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:09:27,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:09:27,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:09:27,695 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:09:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 00:09:27,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 00:09:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:09:27,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:09:27,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:09:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:09:28,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:09:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:09:28,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19976549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:09:28,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:09:28,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 00:09:28,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373258810] [2022-02-11 00:09:28,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:09:28,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:09:28,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:09:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:09:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:09:28,457 INFO L87 Difference]: Start difference. First operand 244014 states and 587201 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 00:09:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:09:32,177 INFO L93 Difference]: Finished difference Result 266371 states and 638012 transitions. [2022-02-11 00:09:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:09:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 38 [2022-02-11 00:09:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:09:33,519 INFO L225 Difference]: With dead ends: 266371 [2022-02-11 00:09:33,520 INFO L226 Difference]: Without dead ends: 266301 [2022-02-11 00:09:33,520 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=385, Invalid=3397, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:09:33,522 INFO L934 BasicCegarLoop]: 101 mSDtfsCounter, 353 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:09:33,522 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 1639 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:09:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266301 states. [2022-02-11 00:09:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266301 to 247320. [2022-02-11 00:09:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247320 states, 247319 states have (on average 2.4065437754479033) internal successors, (595184), 247319 states have internal predecessors, (595184), 0 states have call successors, (0), 0 states 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 00:09:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247320 states to 247320 states and 595184 transitions. [2022-02-11 00:09:40,950 INFO L78 Accepts]: Start accepts. Automaton has 247320 states and 595184 transitions. Word has length 38 [2022-02-11 00:09:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:09:40,950 INFO L470 AbstractCegarLoop]: Abstraction has 247320 states and 595184 transitions. [2022-02-11 00:09:40,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 00:09:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 247320 states and 595184 transitions. [2022-02-11 00:09:41,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:09:41,083 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:09:41,084 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:09:41,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 00:09:41,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-11 00:09:41,286 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:09:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:09:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048424, now seen corresponding path program 66 times [2022-02-11 00:09:41,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:09:41,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235787368] [2022-02-11 00:09:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:09:41,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:09:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:09:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:09:41,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:09:41,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235787368] [2022-02-11 00:09:41,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235787368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:09:41,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341166326] [2022-02-11 00:09:41,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:09:41,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:09:41,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:09:41,542 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:09:41,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 00:09:41,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:09:41,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:09:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:09:41,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:09:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:09:41,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:09:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:09:42,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341166326] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:09:42,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:09:42,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:09:42,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287033546] [2022-02-11 00:09:42,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:09:42,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:09:42,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:09:42,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:09:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:09:42,277 INFO L87 Difference]: Start difference. First operand 247320 states and 595184 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 00:09:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:09:44,955 INFO L93 Difference]: Finished difference Result 263347 states and 631500 transitions. [2022-02-11 00:09:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:09:44,956 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 38 [2022-02-11 00:09:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:09:45,931 INFO L225 Difference]: With dead ends: 263347 [2022-02-11 00:09:45,931 INFO L226 Difference]: Without dead ends: 263330 [2022-02-11 00:09:45,931 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:09:45,932 INFO L934 BasicCegarLoop]: 96 mSDtfsCounter, 225 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:09:45,932 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1646 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:09:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263330 states. [2022-02-11 00:09:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263330 to 248311. [2022-02-11 00:09:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248311 states, 248310 states have (on average 2.4066328379847772) internal successors, (597591), 248310 states have internal predecessors, (597591), 0 states have call successors, (0), 0 states 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 00:09:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248311 states to 248311 states and 597591 transitions. [2022-02-11 00:09:53,107 INFO L78 Accepts]: Start accepts. Automaton has 248311 states and 597591 transitions. Word has length 38 [2022-02-11 00:09:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:09:53,107 INFO L470 AbstractCegarLoop]: Abstraction has 248311 states and 597591 transitions. [2022-02-11 00:09:53,107 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 00:09:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 248311 states and 597591 transitions. [2022-02-11 00:09:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:09:53,175 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:09:53,176 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:09:53,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-11 00:09:53,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:09:53,391 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:09:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:09:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1838109140, now seen corresponding path program 67 times [2022-02-11 00:09:53,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:09:53,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093886055] [2022-02-11 00:09:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:09:53,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:09:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:09:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:09:53,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:09:53,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093886055] [2022-02-11 00:09:53,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093886055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:09:53,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560190078] [2022-02-11 00:09:53,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:09:53,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:09:53,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:09:53,589 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:09:53,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 00:09:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:09:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:09:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:09:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:09:53,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:09:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:09:54,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560190078] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:09:54,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:09:54,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:09:54,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807123224] [2022-02-11 00:09:54,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:09:54,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:09:54,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:09:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:09:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:09:54,217 INFO L87 Difference]: Start difference. First operand 248311 states and 597591 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 00:09:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:09:57,614 INFO L93 Difference]: Finished difference Result 263955 states and 634548 transitions. [2022-02-11 00:09:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:09:57,614 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 38 [2022-02-11 00:09:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:09:58,454 INFO L225 Difference]: With dead ends: 263955 [2022-02-11 00:09:58,454 INFO L226 Difference]: Without dead ends: 263904 [2022-02-11 00:09:58,455 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=595, Invalid=5885, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 00:09:58,455 INFO L934 BasicCegarLoop]: 118 mSDtfsCounter, 374 mSDsluCounter, 2600 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:09:58,455 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2341 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:09:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263904 states. [2022-02-11 00:10:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263904 to 249476. [2022-02-11 00:10:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249476 states, 249475 states have (on average 2.406609880749574) internal successors, (600389), 249475 states have internal predecessors, (600389), 0 states have call successors, (0), 0 states 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 00:10:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249476 states to 249476 states and 600389 transitions. [2022-02-11 00:10:05,059 INFO L78 Accepts]: Start accepts. Automaton has 249476 states and 600389 transitions. Word has length 38 [2022-02-11 00:10:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:10:05,060 INFO L470 AbstractCegarLoop]: Abstraction has 249476 states and 600389 transitions. [2022-02-11 00:10:05,060 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 00:10:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 249476 states and 600389 transitions. [2022-02-11 00:10:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:10:05,123 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:10:05,123 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:10:05,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 00:10:05,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:10:05,339 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:10:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:10:05,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1493213996, now seen corresponding path program 68 times [2022-02-11 00:10:05,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:10:05,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458515599] [2022-02-11 00:10:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:10:05,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:10:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:10:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:10:05,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:10:05,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458515599] [2022-02-11 00:10:05,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458515599] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:10:05,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004632291] [2022-02-11 00:10:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:10:05,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:10:05,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:10:05,507 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:10:05,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 00:10:05,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:10:05,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:10:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:10:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:10:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:10:05,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:10:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:10:06,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004632291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:10:06,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:10:06,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 00:10:06,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914608846] [2022-02-11 00:10:06,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:10:06,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:10:06,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:10:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:10:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:10:06,118 INFO L87 Difference]: Start difference. First operand 249476 states and 600389 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 00:10:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:10:09,590 INFO L93 Difference]: Finished difference Result 293252 states and 702115 transitions. [2022-02-11 00:10:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-11 00:10:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 38 [2022-02-11 00:10:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:10:11,081 INFO L225 Difference]: With dead ends: 293252 [2022-02-11 00:10:11,081 INFO L226 Difference]: Without dead ends: 293183 [2022-02-11 00:10:11,082 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=510, Invalid=5342, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:10:11,103 INFO L934 BasicCegarLoop]: 144 mSDtfsCounter, 397 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:10:11,103 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 2283 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:10:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293183 states. [2022-02-11 00:10:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293183 to 259027. [2022-02-11 00:10:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259027 states, 259026 states have (on average 2.407912719186491) internal successors, (623712), 259026 states have internal predecessors, (623712), 0 states have call successors, (0), 0 states 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 00:10:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259027 states to 259027 states and 623712 transitions. [2022-02-11 00:10:17,892 INFO L78 Accepts]: Start accepts. Automaton has 259027 states and 623712 transitions. Word has length 38 [2022-02-11 00:10:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:10:17,892 INFO L470 AbstractCegarLoop]: Abstraction has 259027 states and 623712 transitions. [2022-02-11 00:10:17,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 00:10:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 259027 states and 623712 transitions. [2022-02-11 00:10:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:10:17,963 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:10:17,963 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:10:17,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-11 00:10:18,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-11 00:10:18,179 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:10:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:10:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1198330438, now seen corresponding path program 69 times [2022-02-11 00:10:18,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:10:18,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396540767] [2022-02-11 00:10:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:10:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:10:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:10:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:10:18,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:10:18,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396540767] [2022-02-11 00:10:18,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396540767] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:10:18,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072483643] [2022-02-11 00:10:18,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:10:18,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:10:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:10:18,355 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:10:18,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 00:10:18,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:10:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:10:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:10:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:10:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:10:18,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:10:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:10:19,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072483643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:10:19,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:10:19,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 00:10:19,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863424672] [2022-02-11 00:10:19,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:10:19,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:10:19,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:10:19,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:10:19,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:10:19,030 INFO L87 Difference]: Start difference. First operand 259027 states and 623712 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 00:10:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:10:22,198 INFO L93 Difference]: Finished difference Result 289168 states and 693821 transitions. [2022-02-11 00:10:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:10:22,198 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 38 [2022-02-11 00:10:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:10:23,554 INFO L225 Difference]: With dead ends: 289168 [2022-02-11 00:10:23,554 INFO L226 Difference]: Without dead ends: 289151 [2022-02-11 00:10:23,554 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=350, Invalid=3682, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:10:23,554 INFO L934 BasicCegarLoop]: 110 mSDtfsCounter, 287 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:10:23,554 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1699 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:10:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289151 states. [2022-02-11 00:10:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289151 to 260145. [2022-02-11 00:10:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260145 states, 260144 states have (on average 2.407966357094532) internal successors, (626418), 260144 states have internal predecessors, (626418), 0 states have call successors, (0), 0 states 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 00:10:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260145 states to 260145 states and 626418 transitions. [2022-02-11 00:10:30,495 INFO L78 Accepts]: Start accepts. Automaton has 260145 states and 626418 transitions. Word has length 38 [2022-02-11 00:10:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:10:30,495 INFO L470 AbstractCegarLoop]: Abstraction has 260145 states and 626418 transitions. [2022-02-11 00:10:30,495 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 00:10:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 260145 states and 626418 transitions. [2022-02-11 00:10:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:10:30,555 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:10:30,555 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:10:30,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-11 00:10:30,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-11 00:10:30,770 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:10:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:10:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1192238897, now seen corresponding path program 7 times [2022-02-11 00:10:30,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:10:30,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395509971] [2022-02-11 00:10:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:10:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:10:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:10:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:10:30,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:10:30,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395509971] [2022-02-11 00:10:30,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395509971] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:10:30,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604874342] [2022-02-11 00:10:30,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:10:30,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:10:30,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:10:30,805 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:10:30,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 00:10:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:10:30,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-11 00:10:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:10:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:10:30,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:10:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:10:30,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604874342] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:10:30,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:10:30,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 11 [2022-02-11 00:10:30,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87952095] [2022-02-11 00:10:30,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:10:30,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 00:10:30,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:10:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 00:10:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:10:30,961 INFO L87 Difference]: Start difference. First operand 260145 states and 626418 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:10:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:10:33,176 INFO L93 Difference]: Finished difference Result 321184 states and 775584 transitions. [2022-02-11 00:10:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:10:33,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:10:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:10:34,220 INFO L225 Difference]: With dead ends: 321184 [2022-02-11 00:10:34,220 INFO L226 Difference]: Without dead ends: 320377 [2022-02-11 00:10:34,220 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:10:34,220 INFO L934 BasicCegarLoop]: 59 mSDtfsCounter, 131 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:10:34,220 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 335 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:10:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320377 states. [2022-02-11 00:10:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320377 to 285108. [2022-02-11 00:10:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285108 states, 285107 states have (on average 2.4088429957875466) internal successors, (686778), 285107 states have internal predecessors, (686778), 0 states have call successors, (0), 0 states 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 00:10:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285108 states to 285108 states and 686778 transitions. [2022-02-11 00:10:42,063 INFO L78 Accepts]: Start accepts. Automaton has 285108 states and 686778 transitions. Word has length 39 [2022-02-11 00:10:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:10:42,064 INFO L470 AbstractCegarLoop]: Abstraction has 285108 states and 686778 transitions. [2022-02-11 00:10:42,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:10:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 285108 states and 686778 transitions. [2022-02-11 00:10:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:10:42,137 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:10:42,137 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:10:42,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-11 00:10:42,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:10:42,353 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:10:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:10:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1351846617, now seen corresponding path program 8 times [2022-02-11 00:10:42,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:10:42,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107565226] [2022-02-11 00:10:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:10:42,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:10:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:10:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:10:42,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:10:42,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107565226] [2022-02-11 00:10:42,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107565226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:10:42,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137763993] [2022-02-11 00:10:42,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:10:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:10:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:10:42,402 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:10:42,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 00:10:42,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:10:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:10:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-11 00:10:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:10:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:10:42,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:10:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:10:42,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137763993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:10:42,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:10:42,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-02-11 00:10:42,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827069790] [2022-02-11 00:10:42,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:10:42,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:10:42,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:10:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:10:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:10:42,567 INFO L87 Difference]: Start difference. First operand 285108 states and 686778 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:10:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:10:44,772 INFO L93 Difference]: Finished difference Result 287926 states and 691391 transitions. [2022-02-11 00:10:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:10:44,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:10:44,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:10:45,937 INFO L225 Difference]: With dead ends: 287926 [2022-02-11 00:10:45,938 INFO L226 Difference]: Without dead ends: 287920 [2022-02-11 00:10:45,938 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:10:45,938 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 73 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:10:45,938 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 212 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:10:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287920 states. [2022-02-11 00:10:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287920 to 285072. [2022-02-11 00:10:51,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285072 states, 285071 states have (on average 2.408557868039892) internal successors, (686610), 285071 states have internal predecessors, (686610), 0 states have call successors, (0), 0 states 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 00:10:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285072 states to 285072 states and 686610 transitions. [2022-02-11 00:10:53,110 INFO L78 Accepts]: Start accepts. Automaton has 285072 states and 686610 transitions. Word has length 39 [2022-02-11 00:10:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:10:53,110 INFO L470 AbstractCegarLoop]: Abstraction has 285072 states and 686610 transitions. [2022-02-11 00:10:53,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:10:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 285072 states and 686610 transitions. [2022-02-11 00:10:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:10:53,173 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:10:53,173 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:10:53,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-11 00:10:53,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:10:53,388 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:10:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:10:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash -735468407, now seen corresponding path program 9 times [2022-02-11 00:10:53,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:10:53,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744783344] [2022-02-11 00:10:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:10:53,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:10:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:10:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:10:53,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:10:53,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744783344] [2022-02-11 00:10:53,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744783344] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:10:53,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012202427] [2022-02-11 00:10:53,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:10:53,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:10:53,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:10:53,441 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:10:53,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 00:10:53,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:10:53,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:10:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-11 00:10:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:10:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:10:53,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:10:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:10:53,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012202427] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:10:53,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:10:53,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-02-11 00:10:53,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700075583] [2022-02-11 00:10:53,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:10:53,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:10:53,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:10:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:10:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:10:53,611 INFO L87 Difference]: Start difference. First operand 285072 states and 686610 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:10:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:10:56,239 INFO L93 Difference]: Finished difference Result 349072 states and 840084 transitions. [2022-02-11 00:10:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:10:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:10:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:10:57,564 INFO L225 Difference]: With dead ends: 349072 [2022-02-11 00:10:57,564 INFO L226 Difference]: Without dead ends: 348327 [2022-02-11 00:10:57,564 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:10:57,564 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 191 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:10:57,565 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 249 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:10:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348327 states. [2022-02-11 00:11:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348327 to 286675. [2022-02-11 00:11:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286675 states, 286674 states have (on average 2.4018013492678096) internal successors, (688534), 286674 states have internal predecessors, (688534), 0 states have call successors, (0), 0 states 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 00:11:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286675 states to 286675 states and 688534 transitions. [2022-02-11 00:11:05,004 INFO L78 Accepts]: Start accepts. Automaton has 286675 states and 688534 transitions. Word has length 39 [2022-02-11 00:11:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:11:05,004 INFO L470 AbstractCegarLoop]: Abstraction has 286675 states and 688534 transitions. [2022-02-11 00:11:05,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:11:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 286675 states and 688534 transitions. [2022-02-11 00:11:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:11:05,512 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:11:05,512 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:11:05,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-11 00:11:05,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-02-11 00:11:05,727 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:11:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:11:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1946601264, now seen corresponding path program 70 times [2022-02-11 00:11:05,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:11:05,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806144784] [2022-02-11 00:11:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:11:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:11:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:11:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:11:05,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:11:05,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806144784] [2022-02-11 00:11:05,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806144784] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:11:05,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756739887] [2022-02-11 00:11:05,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:11:05,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:11:05,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:11:05,788 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:11:05,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 00:11:05,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:11:05,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:11:05,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:11:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:11:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:11:05,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:11:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:11:05,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756739887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:11:05,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:11:05,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-11 00:11:05,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041101371] [2022-02-11 00:11:05,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:11:05,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:11:05,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:11:05,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:11:05,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:11:05,963 INFO L87 Difference]: Start difference. First operand 286675 states and 688534 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 00:11:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:11:08,060 INFO L93 Difference]: Finished difference Result 339005 states and 814007 transitions. [2022-02-11 00:11:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:11:08,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 39 [2022-02-11 00:11:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:11:09,444 INFO L225 Difference]: With dead ends: 339005 [2022-02-11 00:11:09,444 INFO L226 Difference]: Without dead ends: 338883 [2022-02-11 00:11:09,444 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:11:09,445 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 187 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:11:09,445 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 118 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:11:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338883 states. [2022-02-11 00:11:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338883 to 337181. [2022-02-11 00:11:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337181 states, 337180 states have (on average 2.3982917136247703) internal successors, (808656), 337180 states have internal predecessors, (808656), 0 states have call successors, (0), 0 states 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 00:11:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337181 states to 337181 states and 808656 transitions. [2022-02-11 00:11:19,269 INFO L78 Accepts]: Start accepts. Automaton has 337181 states and 808656 transitions. Word has length 39 [2022-02-11 00:11:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:11:19,269 INFO L470 AbstractCegarLoop]: Abstraction has 337181 states and 808656 transitions. [2022-02-11 00:11:19,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 00:11:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 337181 states and 808656 transitions. [2022-02-11 00:11:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:11:19,353 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:11:19,353 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:11:19,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-11 00:11:19,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:11:19,569 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:11:19,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:11:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash -185359280, now seen corresponding path program 71 times [2022-02-11 00:11:19,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:11:19,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126207140] [2022-02-11 00:11:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:11:19,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:11:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:11:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:11:19,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:11:19,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126207140] [2022-02-11 00:11:19,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126207140] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:11:19,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669523119] [2022-02-11 00:11:19,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:11:19,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:11:19,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:11:19,623 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:11:19,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 00:11:19,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:11:19,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:11:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:11:19,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:11:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:11:19,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:11:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:11:19,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669523119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:11:19,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:11:19,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:11:19,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397277714] [2022-02-11 00:11:19,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:11:19,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:11:19,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:11:19,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:11:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:11:19,845 INFO L87 Difference]: Start difference. First operand 337181 states and 808656 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 00:11:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:11:22,619 INFO L93 Difference]: Finished difference Result 338000 states and 806990 transitions. [2022-02-11 00:11:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:11:22,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 39 [2022-02-11 00:11:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:11:24,053 INFO L225 Difference]: With dead ends: 338000 [2022-02-11 00:11:24,053 INFO L226 Difference]: Without dead ends: 337997 [2022-02-11 00:11:24,053 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:11:24,053 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 117 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:11:24,053 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 96 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:11:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337997 states. [2022-02-11 00:11:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337997 to 290870. [2022-02-11 00:11:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290870 states, 290869 states have (on average 2.39994292963499) internal successors, (698069), 290869 states have internal predecessors, (698069), 0 states have call successors, (0), 0 states 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 00:11:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290870 states to 290870 states and 698069 transitions. [2022-02-11 00:11:33,537 INFO L78 Accepts]: Start accepts. Automaton has 290870 states and 698069 transitions. Word has length 39 [2022-02-11 00:11:33,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:11:33,537 INFO L470 AbstractCegarLoop]: Abstraction has 290870 states and 698069 transitions. [2022-02-11 00:11:33,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 00:11:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand 290870 states and 698069 transitions. [2022-02-11 00:11:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:11:33,605 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:11:33,605 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:11:33,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-11 00:11:33,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:11:33,807 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:11:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:11:33,808 INFO L85 PathProgramCache]: Analyzing trace with hash 815477842, now seen corresponding path program 72 times [2022-02-11 00:11:33,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:11:33,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493409726] [2022-02-11 00:11:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:11:33,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:11:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:11:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:11:33,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:11:33,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493409726] [2022-02-11 00:11:33,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493409726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:11:33,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126161837] [2022-02-11 00:11:33,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:11:33,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:11:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:11:33,843 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:11:33,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 00:11:33,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:11:33,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:11:33,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:11:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:11:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:11:33,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:11:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:11:34,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126161837] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:11:34,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:11:34,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:11:34,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950576749] [2022-02-11 00:11:34,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:11:34,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:11:34,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:11:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:11:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:11:34,037 INFO L87 Difference]: Start difference. First operand 290870 states and 698069 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:11:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:11:37,059 INFO L93 Difference]: Finished difference Result 353721 states and 845549 transitions. [2022-02-11 00:11:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:11:37,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:11:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:11:38,518 INFO L225 Difference]: With dead ends: 353721 [2022-02-11 00:11:38,519 INFO L226 Difference]: Without dead ends: 353705 [2022-02-11 00:11:38,519 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:11:38,519 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:11:38,520 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 114 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:11:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353705 states. [2022-02-11 00:11:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353705 to 352361. [2022-02-11 00:11:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352361 states, 352360 states have (on average 2.391792484958565) internal successors, (842772), 352360 states have internal predecessors, (842772), 0 states have call successors, (0), 0 states 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 00:11:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352361 states to 352361 states and 842772 transitions. [2022-02-11 00:11:52,222 INFO L78 Accepts]: Start accepts. Automaton has 352361 states and 842772 transitions. Word has length 39 [2022-02-11 00:11:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:11:52,222 INFO L470 AbstractCegarLoop]: Abstraction has 352361 states and 842772 transitions. [2022-02-11 00:11:52,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:11:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 352361 states and 842772 transitions. [2022-02-11 00:11:52,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:11:52,301 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:11:52,301 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:11:52,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-11 00:11:52,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-02-11 00:11:52,523 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:11:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:11:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash 410110102, now seen corresponding path program 73 times [2022-02-11 00:11:52,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:11:52,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68093592] [2022-02-11 00:11:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:11:52,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:11:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:11:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:11:52,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:11:52,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68093592] [2022-02-11 00:11:52,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68093592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:11:52,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347243114] [2022-02-11 00:11:52,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:11:52,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:11:52,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:11:52,556 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:11:52,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-11 00:11:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:11:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:11:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:11:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 00:11:52,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:11:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 00:11:52,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347243114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:11:52,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:11:52,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:11:52,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396308081] [2022-02-11 00:11:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:11:52,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:11:52,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:11:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:11:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:11:52,757 INFO L87 Difference]: Start difference. First operand 352361 states and 842772 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:11:56,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:11:56,389 INFO L93 Difference]: Finished difference Result 362182 states and 862751 transitions. [2022-02-11 00:11:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:11:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:11:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:11:58,696 INFO L225 Difference]: With dead ends: 362182 [2022-02-11 00:11:58,696 INFO L226 Difference]: Without dead ends: 362179 [2022-02-11 00:11:58,698 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:11:58,701 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 93 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:11:58,702 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 119 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:11:59,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362179 states. [2022-02-11 00:12:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362179 to 357027. [2022-02-11 00:12:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357027 states, 357026 states have (on average 2.387635634379569) internal successors, (852448), 357026 states have internal predecessors, (852448), 0 states have call successors, (0), 0 states 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 00:12:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357027 states to 357027 states and 852448 transitions. [2022-02-11 00:12:09,255 INFO L78 Accepts]: Start accepts. Automaton has 357027 states and 852448 transitions. Word has length 39 [2022-02-11 00:12:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:12:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 357027 states and 852448 transitions. [2022-02-11 00:12:09,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:12:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 357027 states and 852448 transitions. [2022-02-11 00:12:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:12:09,321 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:12:09,321 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:12:09,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-11 00:12:09,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:12:09,536 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:12:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:12:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 875424144, now seen corresponding path program 74 times [2022-02-11 00:12:09,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:12:09,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714580197] [2022-02-11 00:12:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:12:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:12:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:12:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:12:09,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:12:09,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714580197] [2022-02-11 00:12:09,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714580197] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:12:09,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096250325] [2022-02-11 00:12:09,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:12:09,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:12:09,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:12:09,584 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:12:09,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-11 00:12:09,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:12:09,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:12:09,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:12:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:12:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:12:09,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:12:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:12:09,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096250325] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:12:09,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:12:09,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-11 00:12:09,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80178964] [2022-02-11 00:12:09,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:12:09,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 00:12:09,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:12:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 00:12:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:12:09,712 INFO L87 Difference]: Start difference. First operand 357027 states and 852448 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:12:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:12:12,501 INFO L93 Difference]: Finished difference Result 358971 states and 849352 transitions. [2022-02-11 00:12:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:12:12,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:12:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:12:14,581 INFO L225 Difference]: With dead ends: 358971 [2022-02-11 00:12:14,581 INFO L226 Difference]: Without dead ends: 358968 [2022-02-11 00:12:14,581 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:12:14,582 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:12:14,582 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 112 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:12:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358968 states. [2022-02-11 00:12:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358968 to 340334. [2022-02-11 00:12:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340334 states, 340333 states have (on average 2.3787702044762042) internal successors, (809574), 340333 states have internal predecessors, (809574), 0 states have call successors, (0), 0 states 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 00:12:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340334 states to 340334 states and 809574 transitions. [2022-02-11 00:12:28,785 INFO L78 Accepts]: Start accepts. Automaton has 340334 states and 809574 transitions. Word has length 39 [2022-02-11 00:12:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:12:28,786 INFO L470 AbstractCegarLoop]: Abstraction has 340334 states and 809574 transitions. [2022-02-11 00:12:28,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:12:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 340334 states and 809574 transitions. [2022-02-11 00:12:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:12:28,861 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:12:28,861 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:12:28,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-11 00:12:29,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:12:29,079 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:12:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:12:29,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1935502256, now seen corresponding path program 75 times [2022-02-11 00:12:29,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:12:29,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593934145] [2022-02-11 00:12:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:12:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:12:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:12:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:12:29,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:12:29,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593934145] [2022-02-11 00:12:29,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593934145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:12:29,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215439514] [2022-02-11 00:12:29,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:12:29,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:12:29,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:12:29,113 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:12:29,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-11 00:12:29,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:12:29,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:12:29,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:12:29,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:12:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:12:29,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:12:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:12:29,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215439514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:12:29,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:12:29,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-11 00:12:29,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777606209] [2022-02-11 00:12:29,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:12:29,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 00:12:29,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:12:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 00:12:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:12:29,297 INFO L87 Difference]: Start difference. First operand 340334 states and 809574 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:12:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:12:32,905 INFO L93 Difference]: Finished difference Result 341420 states and 811356 transitions. [2022-02-11 00:12:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:12:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:12:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:12:35,121 INFO L225 Difference]: With dead ends: 341420 [2022-02-11 00:12:35,121 INFO L226 Difference]: Without dead ends: 341358 [2022-02-11 00:12:35,121 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:12:35,121 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:12:35,121 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 102 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:12:35,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341358 states. [2022-02-11 00:12:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341358 to 340312. [2022-02-11 00:12:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340312 states, 340311 states have (on average 2.374683745162513) internal successors, (808131), 340311 states have internal predecessors, (808131), 0 states have call successors, (0), 0 states 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 00:12:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340312 states to 340312 states and 808131 transitions. [2022-02-11 00:12:46,078 INFO L78 Accepts]: Start accepts. Automaton has 340312 states and 808131 transitions. Word has length 39 [2022-02-11 00:12:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:12:46,078 INFO L470 AbstractCegarLoop]: Abstraction has 340312 states and 808131 transitions. [2022-02-11 00:12:46,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:12:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 340312 states and 808131 transitions. [2022-02-11 00:12:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:12:46,147 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:12:46,147 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:12:46,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-11 00:12:46,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-11 00:12:46,363 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:12:46,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:12:46,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1358420656, now seen corresponding path program 76 times [2022-02-11 00:12:46,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:12:46,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008079852] [2022-02-11 00:12:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:12:46,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:12:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:12:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:12:46,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:12:46,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008079852] [2022-02-11 00:12:46,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008079852] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:12:46,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965738856] [2022-02-11 00:12:46,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:12:46,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:12:46,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:12:46,390 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:12:46,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-11 00:12:46,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:12:46,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:12:46,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:12:46,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:12:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:12:46,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:12:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:12:46,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965738856] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:12:46,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:12:46,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:12:46,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047118221] [2022-02-11 00:12:46,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:12:46,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:12:46,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:12:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:12:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:12:46,531 INFO L87 Difference]: Start difference. First operand 340312 states and 808131 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:12:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:12:49,301 INFO L93 Difference]: Finished difference Result 350854 states and 832315 transitions. [2022-02-11 00:12:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:12:49,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:12:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:12:50,876 INFO L225 Difference]: With dead ends: 350854 [2022-02-11 00:12:50,876 INFO L226 Difference]: Without dead ends: 350838 [2022-02-11 00:12:50,876 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:12:50,877 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:12:50,885 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 126 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:12:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350838 states. [2022-02-11 00:12:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350838 to 350557. [2022-02-11 00:12:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350557 states, 350556 states have (on average 2.372434076153311) internal successors, (831671), 350556 states have internal predecessors, (831671), 0 states have call successors, (0), 0 states 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 00:13:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350557 states to 350557 states and 831671 transitions. [2022-02-11 00:13:02,156 INFO L78 Accepts]: Start accepts. Automaton has 350557 states and 831671 transitions. Word has length 39 [2022-02-11 00:13:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:13:02,157 INFO L470 AbstractCegarLoop]: Abstraction has 350557 states and 831671 transitions. [2022-02-11 00:13:02,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 350557 states and 831671 transitions. [2022-02-11 00:13:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:13:02,231 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:13:02,231 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:13:02,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-02-11 00:13:02,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:02,448 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:13:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:13:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1763788396, now seen corresponding path program 77 times [2022-02-11 00:13:02,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:13:02,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702818205] [2022-02-11 00:13:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:13:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:13:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:13:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:13:02,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:13:02,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702818205] [2022-02-11 00:13:02,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702818205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:13:02,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722138400] [2022-02-11 00:13:02,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:13:02,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:02,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:13:02,505 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:13:02,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-11 00:13:02,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 00:13:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:13:02,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:13:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:13:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:13:02,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:13:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:13:02,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722138400] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:13:02,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:13:02,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:13:02,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278412974] [2022-02-11 00:13:02,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:13:02,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:13:02,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:13:02,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:13:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:13:02,712 INFO L87 Difference]: Start difference. First operand 350557 states and 831671 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:13:05,567 INFO L93 Difference]: Finished difference Result 356211 states and 843397 transitions. [2022-02-11 00:13:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:13:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:13:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:13:06,610 INFO L225 Difference]: With dead ends: 356211 [2022-02-11 00:13:06,611 INFO L226 Difference]: Without dead ends: 356208 [2022-02-11 00:13:06,611 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:13:06,611 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:13:06,611 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 115 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:13:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356208 states. [2022-02-11 00:13:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356208 to 352212. [2022-02-11 00:13:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352212 states, 352211 states have (on average 2.371021915840221) internal successors, (835100), 352211 states have internal predecessors, (835100), 0 states have call successors, (0), 0 states 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 00:13:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352212 states to 352212 states and 835100 transitions. [2022-02-11 00:13:15,993 INFO L78 Accepts]: Start accepts. Automaton has 352212 states and 835100 transitions. Word has length 39 [2022-02-11 00:13:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:13:15,993 INFO L470 AbstractCegarLoop]: Abstraction has 352212 states and 835100 transitions. [2022-02-11 00:13:15,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 352212 states and 835100 transitions. [2022-02-11 00:13:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:13:16,051 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:13:16,052 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:13:16,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-11 00:13:16,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:16,267 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:13:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:13:16,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1298474354, now seen corresponding path program 78 times [2022-02-11 00:13:16,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:13:16,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392436959] [2022-02-11 00:13:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:13:16,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:13:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:13:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:13:16,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:13:16,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392436959] [2022-02-11 00:13:16,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392436959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:13:16,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949303059] [2022-02-11 00:13:16,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:13:16,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:16,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:13:16,302 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:13:16,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-11 00:13:16,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-11 00:13:16,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:13:16,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:13:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:13:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:13:16,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:13:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:13:16,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949303059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:13:16,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:13:16,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-11 00:13:16,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072873840] [2022-02-11 00:13:16,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:13:16,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 00:13:16,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:13:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 00:13:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:13:16,437 INFO L87 Difference]: Start difference. First operand 352212 states and 835100 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:13:18,828 INFO L93 Difference]: Finished difference Result 359965 states and 850571 transitions. [2022-02-11 00:13:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:13:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:13:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:13:20,772 INFO L225 Difference]: With dead ends: 359965 [2022-02-11 00:13:20,772 INFO L226 Difference]: Without dead ends: 359953 [2022-02-11 00:13:20,772 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:13:20,773 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:13:20,773 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 120 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:13:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359953 states. [2022-02-11 00:13:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359953 to 357309. [2022-02-11 00:13:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357309 states, 357308 states have (on average 2.364495057485419) internal successors, (844853), 357308 states have internal predecessors, (844853), 0 states have call successors, (0), 0 states 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 00:13:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357309 states to 357309 states and 844853 transitions. [2022-02-11 00:13:32,488 INFO L78 Accepts]: Start accepts. Automaton has 357309 states and 844853 transitions. Word has length 39 [2022-02-11 00:13:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:13:32,488 INFO L470 AbstractCegarLoop]: Abstraction has 357309 states and 844853 transitions. [2022-02-11 00:13:32,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 357309 states and 844853 transitions. [2022-02-11 00:13:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:13:32,575 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:13:32,576 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:13:32,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-11 00:13:32,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:32,793 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:13:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:13:32,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1663842512, now seen corresponding path program 79 times [2022-02-11 00:13:32,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:13:32,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268563712] [2022-02-11 00:13:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:13:32,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:13:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:13:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:13:32,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:13:32,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268563712] [2022-02-11 00:13:32,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268563712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:13:32,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079533675] [2022-02-11 00:13:32,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:13:32,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:32,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:13:32,832 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:13:32,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-11 00:13:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:13:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:13:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:13:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:13:32,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:13:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:13:32,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079533675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:13:32,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:13:32,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-11 00:13:32,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593349464] [2022-02-11 00:13:32,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:13:32,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:13:32,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:13:32,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:13:32,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:13:32,982 INFO L87 Difference]: Start difference. First operand 357309 states and 844853 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:13:35,381 INFO L93 Difference]: Finished difference Result 357767 states and 843492 transitions. [2022-02-11 00:13:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:13:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-11 00:13:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:13:36,828 INFO L225 Difference]: With dead ends: 357767 [2022-02-11 00:13:36,828 INFO L226 Difference]: Without dead ends: 357755 [2022-02-11 00:13:36,828 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:13:36,828 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 84 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:13:36,828 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 142 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:13:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357755 states. [2022-02-11 00:13:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357755 to 350533. [2022-02-11 00:13:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350533 states, 350532 states have (on average 2.362486163888033) internal successors, (828127), 350532 states have internal predecessors, (828127), 0 states have call successors, (0), 0 states 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 00:13:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350533 states to 350533 states and 828127 transitions. [2022-02-11 00:13:46,795 INFO L78 Accepts]: Start accepts. Automaton has 350533 states and 828127 transitions. Word has length 39 [2022-02-11 00:13:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:13:46,796 INFO L470 AbstractCegarLoop]: Abstraction has 350533 states and 828127 transitions. [2022-02-11 00:13:46,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 350533 states and 828127 transitions. [2022-02-11 00:13:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-11 00:13:46,979 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:13:46,980 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:13:46,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-11 00:13:47,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-02-11 00:13:47,196 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:13:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:13:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash -82315980, now seen corresponding path program 80 times [2022-02-11 00:13:47,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:13:47,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376857761] [2022-02-11 00:13:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:13:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:13:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:13:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:13:47,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:13:47,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376857761] [2022-02-11 00:13:47,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376857761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:13:47,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091352348] [2022-02-11 00:13:47,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:13:47,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:47,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:13:47,250 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:13:47,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-11 00:13:48,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:13:48,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:13:48,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 00:13:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:13:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:13:48,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:13:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:13:48,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091352348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:13:48,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:13:48,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-02-11 00:13:48,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001802122] [2022-02-11 00:13:48,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:13:48,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:13:48,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:13:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:13:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:13:48,157 INFO L87 Difference]: Start difference. First operand 350533 states and 828127 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:13:49,884 INFO L93 Difference]: Finished difference Result 257099 states and 593352 transitions. [2022-02-11 00:13:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:13:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-11 00:13:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:13:50,615 INFO L225 Difference]: With dead ends: 257099 [2022-02-11 00:13:50,615 INFO L226 Difference]: Without dead ends: 257099 [2022-02-11 00:13:50,615 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:13:50,615 INFO L934 BasicCegarLoop]: 65 mSDtfsCounter, 216 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:13:50,615 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 466 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:13:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257099 states. [2022-02-11 00:13:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257099 to 150344. [2022-02-11 00:13:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150344 states, 150343 states have (on average 2.301171321577992) internal successors, (345965), 150343 states have internal predecessors, (345965), 0 states have call successors, (0), 0 states 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 00:13:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150344 states to 150344 states and 345965 transitions. [2022-02-11 00:13:56,311 INFO L78 Accepts]: Start accepts. Automaton has 150344 states and 345965 transitions. Word has length 41 [2022-02-11 00:13:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:13:56,311 INFO L470 AbstractCegarLoop]: Abstraction has 150344 states and 345965 transitions. [2022-02-11 00:13:56,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:13:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 150344 states and 345965 transitions. [2022-02-11 00:13:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-11 00:13:56,365 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:13:56,365 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:13:56,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-11 00:13:56,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:56,572 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:13:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:13:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1495522452, now seen corresponding path program 81 times [2022-02-11 00:13:56,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:13:56,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264398481] [2022-02-11 00:13:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:13:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:13:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:13:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:13:56,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:13:56,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264398481] [2022-02-11 00:13:56,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264398481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:13:56,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497894662] [2022-02-11 00:13:56,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:13:56,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:13:56,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:13:56,634 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:13:56,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-11 00:13:56,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:13:56,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:13:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 00:13:56,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:13:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:13:56,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:13:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 00:13:56,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497894662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:13:56,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:13:56,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-02-11 00:13:56,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205995914] [2022-02-11 00:13:56,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:13:56,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:13:56,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:13:56,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:13:56,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:13:56,810 INFO L87 Difference]: Start difference. First operand 150344 states and 345965 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 00:13:57,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:13:57,881 INFO L93 Difference]: Finished difference Result 144159 states and 325044 transitions. [2022-02-11 00:13:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:13:57,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 41 [2022-02-11 00:13:57,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:13:58,326 INFO L225 Difference]: With dead ends: 144159 [2022-02-11 00:13:58,327 INFO L226 Difference]: Without dead ends: 144001 [2022-02-11 00:13:58,327 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:13:58,327 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 494 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:13:58,327 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 354 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:13:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144001 states. [2022-02-11 00:14:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144001 to 131031. [2022-02-11 00:14:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131031 states, 131030 states have (on average 2.254582919941998) internal successors, (295418), 131030 states have internal predecessors, (295418), 0 states have call successors, (0), 0 states 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 00:14:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131031 states to 131031 states and 295418 transitions. [2022-02-11 00:14:01,591 INFO L78 Accepts]: Start accepts. Automaton has 131031 states and 295418 transitions. Word has length 41 [2022-02-11 00:14:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:14:01,591 INFO L470 AbstractCegarLoop]: Abstraction has 131031 states and 295418 transitions. [2022-02-11 00:14:01,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 00:14:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 131031 states and 295418 transitions. [2022-02-11 00:14:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-11 00:14:02,125 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:14:02,125 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:14:02,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-11 00:14:02,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:14:02,355 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:14:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:14:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1555357781, now seen corresponding path program 82 times [2022-02-11 00:14:02,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:14:02,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533577667] [2022-02-11 00:14:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:14:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:14:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:14:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:14:02,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:14:02,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533577667] [2022-02-11 00:14:02,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533577667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:14:02,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393370561] [2022-02-11 00:14:02,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:14:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:14:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:14:02,559 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:14:02,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-11 00:14:02,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:14:02,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:14:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 00:14:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:14:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:14:02,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:14:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:14:03,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393370561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:14:03,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:14:03,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-02-11 00:14:03,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502102902] [2022-02-11 00:14:03,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:14:03,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:14:03,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:14:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:14:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:14:03,315 INFO L87 Difference]: Start difference. First operand 131031 states and 295418 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 00:14:06,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:14:06,227 INFO L93 Difference]: Finished difference Result 155842 states and 350763 transitions. [2022-02-11 00:14:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:14:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 42 [2022-02-11 00:14:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:14:06,711 INFO L225 Difference]: With dead ends: 155842 [2022-02-11 00:14:06,711 INFO L226 Difference]: Without dead ends: 155767 [2022-02-11 00:14:06,712 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=494, Invalid=4336, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:14:06,712 INFO L934 BasicCegarLoop]: 125 mSDtfsCounter, 506 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:14:06,712 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1454 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:14:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155767 states. [2022-02-11 00:14:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155767 to 134288. [2022-02-11 00:14:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134288 states, 134287 states have (on average 2.2562198872563988) internal successors, (302981), 134287 states have internal predecessors, (302981), 0 states have call successors, (0), 0 states 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 00:14:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134288 states to 134288 states and 302981 transitions. [2022-02-11 00:14:10,530 INFO L78 Accepts]: Start accepts. Automaton has 134288 states and 302981 transitions. Word has length 42 [2022-02-11 00:14:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:14:10,530 INFO L470 AbstractCegarLoop]: Abstraction has 134288 states and 302981 transitions. [2022-02-11 00:14:10,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 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 00:14:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 134288 states and 302981 transitions. [2022-02-11 00:14:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-11 00:14:10,604 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:14:10,604 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:14:10,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-11 00:14:10,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:14:10,820 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:14:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:14:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash 80278243, now seen corresponding path program 83 times [2022-02-11 00:14:10,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:14:10,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739148189] [2022-02-11 00:14:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:14:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:14:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:14:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:14:11,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:14:11,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739148189] [2022-02-11 00:14:11,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739148189] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:14:11,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368648067] [2022-02-11 00:14:11,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:14:11,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:14:11,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:14:11,093 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:14:11,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-11 00:14:11,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 00:14:11,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:14:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 00:14:11,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:14:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:14:11,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:14:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:14:12,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368648067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:14:12,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:14:12,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-02-11 00:14:12,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873303443] [2022-02-11 00:14:12,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:14:12,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:14:12,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:14:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:14:12,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:14:12,566 INFO L87 Difference]: Start difference. First operand 134288 states and 302981 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:14:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:14:14,822 INFO L93 Difference]: Finished difference Result 163784 states and 369053 transitions. [2022-02-11 00:14:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:14:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-11 00:14:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:14:15,444 INFO L225 Difference]: With dead ends: 163784 [2022-02-11 00:14:15,444 INFO L226 Difference]: Without dead ends: 163678 [2022-02-11 00:14:15,444 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=429, Invalid=3231, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:14:15,445 INFO L934 BasicCegarLoop]: 99 mSDtfsCounter, 373 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:14:15,445 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1743 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:14:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163678 states. Received shutdown request... [2022-02-11 00:14:17,791 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 00:14:17,791 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 00:14:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163678 to 142342. [2022-02-11 00:14:18,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2022-02-11 00:14:18,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-11 00:14:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142342 states, 142341 states have (on average 2.2571360324853695) internal successors, (321283), 142341 states have internal predecessors, (321283), 0 states have call successors, (0), 0 states 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 00:14:19,090 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-11 00:14:19,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-11 00:14:19,092 WARN L594 AbstractCegarLoop]: Verification canceled: while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). [2022-02-11 00:14:19,093 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-11 00:14:19,093 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-11 00:14:19,095 INFO L733 BasicCegarLoop]: Path program histogram: [83, 9, 2, 1, 1] [2022-02-11 00:14:19,096 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 00:14:19,097 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 00:14:19,098 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 12:14:19 BasicIcfg [2022-02-11 00:14:19,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 00:14:19,098 INFO L158 Benchmark]: Toolchain (without parser) took 675702.08ms. Allocated memory was 209.7MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 170.5MB in the beginning and 4.9GB in the end (delta: -4.8GB). Peak memory consumption was 3.3GB. Max. memory is 8.0GB. [2022-02-11 00:14:19,098 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 209.7MB. Free memory is still 171.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 00:14:19,098 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.59ms. Allocated memory is still 209.7MB. Free memory was 170.4MB in the beginning and 168.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-11 00:14:19,098 INFO L158 Benchmark]: Boogie Preprocessor took 12.51ms. Allocated memory is still 209.7MB. Free memory was 168.9MB in the beginning and 168.0MB in the end (delta: 911.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 00:14:19,098 INFO L158 Benchmark]: RCFGBuilder took 284.58ms. Allocated memory is still 209.7MB. Free memory was 167.9MB in the beginning and 159.2MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-11 00:14:19,098 INFO L158 Benchmark]: TraceAbstraction took 675376.26ms. Allocated memory was 209.7MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 158.7MB in the beginning and 4.9GB in the end (delta: -4.8GB). Peak memory consumption was 3.3GB. Max. memory is 8.0GB. [2022-02-11 00:14:19,099 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 209.7MB. Free memory is still 171.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.59ms. Allocated memory is still 209.7MB. Free memory was 170.4MB in the beginning and 168.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.51ms. Allocated memory is still 209.7MB. Free memory was 168.9MB in the beginning and 168.0MB in the end (delta: 911.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 284.58ms. Allocated memory is still 209.7MB. Free memory was 167.9MB in the beginning and 159.2MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 675376.26ms. Allocated memory was 209.7MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 158.7MB in the beginning and 4.9GB in the end (delta: -4.8GB). Peak memory consumption was 3.3GB. 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: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 675.3s, OverallIterations: 96, TraceHistogramMax: 5, PathProgramHistogramMax: 83, EmptinessCheckTime: 5.5s, AutomataDifference: 248.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26977 SdHoareTripleChecker+Valid, 40.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26977 mSDsluCounter, 108722 SdHoareTripleChecker+Invalid, 34.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 117831 mSDsCounter, 6203 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 95077 IncrementalHoareTripleChecker+Invalid, 101280 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6203 mSolverCounterUnsat, 8022 mSDtfsCounter, 95077 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9715 GetRequests, 5017 SyntacticMatches, 331 SemanticMatches, 4367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103092 ImplicationChecksByTransitivity, 93.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357309occurred in iteration=91, InterpolantAutomatonStates: 3896, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 341.5s AutomataMinimizationTime, 96 MinimizatonAttempts, 1026016 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 54.2s InterpolantComputationTime, 6294 NumberOfCodeBlocks, 6276 NumberOfCodeBlocksAsserted, 371 NumberOfCheckSat, 9136 ConstructedInterpolants, 0 QuantifiedInterpolants, 92258 SizeOfPredicates, 424 NumberOfNonLiveVariables, 5887 ConjunctsInSsa, 1446 ConjunctsInUnsatCore, 282 InterpolantComputations, 3 PerfectInterpolantSequences, 2148/7461 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